You are not misrembering. They announced it at the beginning of this month [0][1] and have officially shut down all of their hosted instances as of about a week ago [2]

[0] https://cadence.moe/blog/2022-09-01-discontinuing-bibliogram

[1] https://news.ycombinator.com/item?id=32683722

[2] https://git.sr.ht/~cadence/bibliogram-docs/tree/master/docs/...

Correct, but it still seems to be functioning somewhat. https://bibliogram.art/

Plus,this project's last release is from before that announcement.

When this project's last release is doesn't matter if they are forwarding your URL to a project where all the instances are shut down.

Are all instances shut down? The creator shut down theirs, but I'd imagine some other people are still hosting it, or self hosting is an option.

edit though I mentioned the last release more to say "this was made before it shut down, they may remove/limit support post shutdown."

I don't think it matters if there are instances up if they don't work. If the devs quit because they spent of their time trying to circumvent Instagram's blocks then if they quit, it's only a matter of time before it stops working due to Instagram's interference.