currently writing this from infinity for lemmy (which also apparently and recently rebranded to Eternity instead of infinity for lemmy), it is a fork of the original for reddit and can be found here

https://codeberg.org/Bazsalanszky/Eternity

as for original Infinity still working the dev said that it would still be working up until they release a version that would continue to work using donations for the API access but on the meantime the original is still working and accessible