I found a new server called The Anchor and it is only a few days old. It is a Minecraft SMP on Java and it is running on 1.21.11.
It is small right now with around five players who hop on sometimes. They are trying to find more regular players so the world feels more alive.
If you want a fresh community that is not huge this one fits that. If you have questions you can message the owner.
The Anchor Fresh 1.21.11 SMP
GG.MINEWIND.NET New Server IPFresh PVP SMP Vanilla Survival Grind
I found a brand new survival server that is all about a classic vanilla world with pvp drama.
The world has a 5000 block border so running away forever is not really a thing and people will run into each other.
It also has infinite villager trading so trading halls can get wild and you can grind gear fast if you play it smart.
You grab the server info from the discord and then you can jump in and start building and fighting.GG.MINEWIND.NET New Server IP