So, the promised intel, from today:
Trying to always build RPi 4B 64 bit with the core-image-minimal recepie

Hardknott repo with Hardknott as project choosen did work, only did show following warning at the end

> 
> /home/user/yocto_hardknott/poky/bitbake/lib/bb/ui/uievent.py:47:
> DeprecationWarning: Using or importing the ABCs from 'collections' instead
> of from 'collections.abc' is deprecated, and in 3.8 it will stop working 
> if isinstance(ret, collections.Iterable):

Honister repo with Honister as project choosen did NOT work, showing this error:

Traceback (most recent call last):
File "/home/user/yocto_honister/poky/bitbake/bin/bitbake", line 38, in <module>
cookerdata.CookerConfiguration()))
File "/home/user/yocto_honister/poky/bitbake/lib/bb/main.py", line 379, in bitbake_main
configParams)
File "/home/user/yocto_honister/poky/bitbake/lib/bb/ui/toasterui.py", line 135, in main
params.updateToServer(server, os.environ.copy())
File "/home/user/yocto_honister/poky/bitbake/lib/bb/cookerdata.py", line 75, in updateToServer
raise Exception("Unable to update the server configuration with local parameters: %s" % error)
Exception: Unable to update the server configuration with local parameters: bb.BBHandledException()
Traceback (most recent call last):
File "/home/user/yocto_honister/poky/_toaster_clones/_git___git.yoctoproject.org_poky_honister/bitbake/lib/bb/cookerdata.py", line 274, in parseBaseConfiguration
bb.event.fire(bb.event.ConfigParsed(), self.data)
File "/home/user/yocto_honister/poky/_toaster_clones/_git___git.yoctoproject.org_poky_honister/bitbake/lib/bb/event.py", line 216, in fire
fire_class_handlers(event, d)
File "/home/user/yocto_honister/poky/_toaster_clones/_git___git.yoctoproject.org_poky_honister/bitbake/lib/bb/event.py", line 123, in fire_class_handlers
execute_handler(name, handler, event, d)
File "/home/user/yocto_honister/poky/_toaster_clones/_git___git.yoctoproject.org_poky_honister/bitbake/lib/bb/event.py", line 93, in execute_handler
ret = handler(event)
File "/home/user/yocto_honister/poky/_toaster_clones/_git___git.yoctoproject.org_poky_honister/meta/classes/base.bbclass", line 243, in defaultbase_eventhandler
setup_hosttools_dir(d.getVar('HOSTTOOLS_DIR'), 'HOSTTOOLS', d)
File "/home/user/yocto_honister/poky/_toaster_clones/_git___git.yoctoproject.org_poky_honister/meta/classes/base.bbclass", line 146, in setup_hosttools_dir
bb.fatal("The following required tools (as specified by HOSTTOOLS) appear to be unavailable in PATH, please install them in order to proceed:\n  %s" % " ".join(notfound))
File "/home/user/yocto_honister/poky/_toaster_clones/_git___git.yoctoproject.org_poky_honister/bitbake/lib/bb/__init__.py", line 165, in fatal
raise BBHandledException()
bb.BBHandledException

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/home/user/yocto_honister/poky/_toaster_clones/_git___git.yoctoproject.org_poky_honister/bitbake/lib/bb/command.py", line 90, in runCommand
result = command_method(self, commandline)
File "/home/user/yocto_honister/poky/_toaster_clones/_git___git.yoctoproject.org_poky_honister/bitbake/lib/bb/command.py", line 286, in updateConfig
command.cooker.updateConfigOpts(options, environment, cmdline)
File "/home/user/yocto_honister/poky/_toaster_clones/_git___git.yoctoproject.org_poky_honister/bitbake/lib/bb/cooker.py", line 506, in updateConfigOpts
self.reset()
File "/home/user/yocto_honister/poky/_toaster_clones/_git___git.yoctoproject.org_poky_honister/bitbake/lib/bb/cooker.py", line 1738, in reset
self.initConfigurationData()
File "/home/user/yocto_honister/poky/_toaster_clones/_git___git.yoctoproject.org_poky_honister/bitbake/lib/bb/cooker.py", line 360, in initConfigurationData
self.databuilder.parseBaseConfiguration()
File "/home/user/yocto_honister/poky/_toaster_clones/_git___git.yoctoproject.org_poky_honister/bitbake/lib/bb/cookerdata.py", line 305, in parseBaseConfiguration
raise bb.BBHandledException()
bb.BBHandledException

Master, with Kirkstone choosen did not work (nothing available), which was to be expected
Master, with Yocto Project Master choosen did crash upon build with this error

2022-04-07 12:57:41,255 DEBUG Saving error Bitbake crash
Traceback (most recent call last):
File "/home/user/yocto_master/poky/_toaster_clones/_git___git.yoctoproject.org_poky_master/bitbake/lib/bb/command.py", line 90, in runCommand
result = command_method(self, commandline)
File "/home/user/yocto_master/poky/_toaster_clones/_git___git.yoctoproject.org_poky_master/bitbake/lib/bb/command.py", line 286, in updateConfig
command.cooker.updateConfigOpts(options, environment, cmdline)
File "/home/user/yocto_master/poky/_toaster_clones/_git___git.yoctoproject.org_poky_master/bitbake/lib/bb/cooker.py", line 536, in updateConfigOpts
self.reset()
File "/home/user/yocto_master/poky/_toaster_clones/_git___git.yoctoproject.org_poky_master/bitbake/lib/bb/cooker.py", line 1776, in reset
self.initConfigurationData()
File "/home/user/yocto_master/poky/_toaster_clones/_git___git.yoctoproject.org_poky_master/bitbake/lib/bb/cooker.py", line 389, in initConfigurationData
self.databuilder = bb.cookerdata.CookerDataBuilder(self.configuration, False)
File "/home/user/yocto_master/poky/_toaster_clones/_git___git.yoctoproject.org_poky_master/bitbake/lib/bb/cookerdata.py", line 252, in __init__
bb.fatal("Exiting to allow enviroment variables to be corrected")
File "/home/user/yocto_master/poky/_toaster_clones/_git___git.yoctoproject.org_poky_master/bitbake/lib/bb/__init__.py", line 178, in fatal
raise BBHandledException()
bb.BBHandledException

So currently only Hardknott works.

Cheers,

Nico