Earlier quoted context omitted.
Trust me it's not worth the effort to get USB passthrough for HAOS on Docker.
What do you mean by “HAOS on docker”. HAOS is a standalone complete Linux system with its own fully managed kernel, not meant to be containerized. It uses docker internally itself though and “pass through” works transparently. If you’re talking about running home assistant in a docker container, sure you’re more on your own, but since official home assistant in HAOS must run in docker, none of this is terribly diffic…
I’m impressed with your knowledge of the Linux ecosystem. Regardless, passing usb devices to the containerised version is still more effort than it’s worth for the average user.