I found Lounge SMP and it is a semi vanilla survival server on 1.21.11. It feels like normal Survival but with some custom features that stay simple.
The world is meant to last forever and there is a small world border. People mostly hangout build stuff and just play at a chill pace.
The server also says it has anti grief and strong anti cheat. There are jobs rewards crates and give aways too. Bedrock players can join as well.
