I found a small chill Minecraft Java server that runs on 1.20.1 with Fabric. It has about 8 to 10 regular players and they want a few more friendly people to join.
They use their own mod list with new monsters and weapons and armor plus furniture and RPG stuff. There are dungeons to explore and lots of new things to discover while you play.
The vibe is cooperative survival where people build cozy bases and shared towns and connect areas with paths. They also use proximity voice chat so it feels like you are just talking while building or running into someone while exploring.
The server is getting reset soon so everyone starts fresh. It is not a sweaty server and it is not focused on PvP. People just play at their own pace and try to keep good vibes.
