The closest to a XMR fork is Garnet and it is still a WIP.
Discussion
Looks like nostr:nprofile1qqs827g8dkd07zjvlhh60csytujgd3l9mz7x807xk3fewge7rwlukxgpz4mhxue69uhhyetvv9ujuerpd46hxtnfduhszrnhwden5te0dehhxtnvdakz7auvdel is going to incorporate Monero tipping into Amethyst. No need to fork.
Send him a zap or two if you could.