I found a Java server that people say is the best.
It runs on Minecraft Java 1.21.5 and it is called SFOCHIA.
There are no extra details given so it looks like you just join and play.
THE BEST JAVA 1.21.5 SERVER
GG.MINEWIND.NET New Server IPTHE BEST SERVER NEEDS YOU
I found a Minecraft server called Summit Survival and it is trying to grow. The post says they need you so it feels like they want more players to join and help make the server feel alive.
It is a simple invite and it is all about getting people together. If you want a place where your joining actually matters this seems like that kind of server.GG.MINEWIND.NET New Server IP