thanx for your reply.
i'm not really familiar with the docker thing, but in the documentation on the sunfounder site i do find this sentence - "This only works for Home Assistant OS, running on Raspberry Pi. Not for Home Assistant Container.". unless i am corrected, i will have to assume this to be a dead end.
i'll check with sunfounder on possibly supporting le, but their similar case for the rpi4 does specifically exclude support for le.