I can’t see emojis anymore, they don’t work on librewolf.

I first noticed this under a post titled something like “try telling a story using only emojis”. The comments were empty.

If I open the same page in brave browser, they work as intended. I can’t see emojis in apps like libreoffice either. Is there a way to get system-wide emoji support?

(I am on Fedora 42)