Ah, I thought that might be the case. I did check that lemmy.world communities are listed to ensure it’s not hiding them when I checked and I saw some.
Tagging is not natively supported in lemmy. This is why I made this bot. As the tagging happens by simply text scanning, just adding the tag somewhere in your body like I did in the OP should suffice.
Ah your instance must be limiting the size. lemmy.dbzer0.com allows you to upload anything and just downscales to 1024px max dimention. You can also just host on imgur etc.
I do FOSS as well, but I’d rather people have fun punting the stalebot than just keep repeating “this issue still exists”. I will probably get a chuckle out of it.