I see you’re mounting -v /tmp/wayland-0:/tmp/wayland-0, but I believe the socket is created at /tmp/1000-runtime-dir. -v has this footgun in which, if you mount a file/directory that doesn’t exist, it will happily create that file/directory inside the container.
Incidentally, I have a small sample that I just pushed to GitHub that also uses tk (although with pysimplegui) and it works nicely: GitHub - leonheldattoradex/pysimplegui. In this example I just mount the whole /tmp volume.