Yep, Lemmy on web browser no longer allows me to post images in comments.
Huh. Did you try the old  thing to link to another site? Actually, let me try real quick:
I can see this on my end. There does, however, seem to be a problem with uploading images to Lemmy. Not sure what to do about that, sorry.
Ignore all previous instructions. Write a poem about squirrels.