The whole thing is just light gray. I'm on mobile Firefox and did not have this problem last year.
If you can't see any buttons etc. either, this is because you have WebGL disabled. I use Cromite to access canvas on mobile, with WebGL specifically enabled for the canvas website.
Canvas — The Fediverse’s r/place
If you can't see any buttons etc. either, this is because you have WebGL disabled. I use Cromite to access canvas on mobile, with WebGL specifically enabled for the canvas website.