Honestly, I would be very much down to see this on Lemmy too. “This account was registered from country X” “Last post from country Y” (Or alternatively, “Last post from known VPN” so you at least know it’s happening.)

It adds some interesting context at the very least.

https://friendi.ca/

Mind you, I have never in my life tried to use it, but my understanding is that is the Fediverse equivalent of FB. I’m mostly on Mastodon or Pixelfed, which are the equivalents of Twitter and Instragram.