Please make sure you have “undetermined” selected in your list of spoken languages in your lemmy settings in addition to any other languages you speak.
Most lemmy content does not come through with a language tag, and you need to have undermined selected as an option to see that content.
This one wouldn’t federate to you properly. It’s a group specifically for members of Blåhaj Lemmy, so you’re very possibly the first person on your instance too try and find it.
As such, votes and replies won’t be correctly visible, because they don’t backdate completely