I found a server called AZURE SMP that is trying to recreate the AltarSMP but in their own way
It is an SMP with PVP and it leans semi anarchy so it sounds like things can get wild
They also use plugins to make setbacks less grueling to come back from and they add some quality of life stuff too
It is launching today and it has stuff like ender pearl cooldowns an end lock crossplay with Geyser and Floodgate and anti combat log plus some extra gameplay plugins
AZURE SMP Semi-Anarchy PVP Launch Day
GG.MINEWIND.NET New Server IPOnion SMP Crossplay Survival 1.21.11
Onion SMP is a survival server that runs on 1.21.11 and it is crossplay so more people can join together.
It has claims so your builds can be protected. Keep inventory is on so dying is not as painful. There is rtp so you can get away from spawn fast.
It also has combat log protection so fights do not get ruined. You can make teams too so it is easy to play with friends.GG.MINEWIND.NET New Server IP