In incus, I had the same setup of an LCX container with a Docker container inside of it. I passed 1000/1000 to the LXC container but the LXC container’s default root user has a an ID set of 0/0. So I had to pass 0/0 to the Docker container, not 1000/1000 to get the read/write permissions working.
That may fix your issue as it’s basically the same tech, just different automated things implementing the LXC container!
Dipshits don’t even get it’s this based on this painting https://musee-magnin.fr/en/node/19 which is in a French museum, about the gods of Olympus, and includes the lyre you see in the recreation. It’s not the last supper which is in Italy and not in France. Similar framing of course - clearly on purpose - but who cares. What dumbasses, outrage machine go burrr