I found a new FoN Cobblemon server that is looking for people to join.
To get the server info you have to join their Discord first. It seems like they are trying to grow a fresh community and get more players in.
New FoN Cobblemon Server Join Up
GG.MINEWIND.NET New Server IPFresh Vanilla Java SMP Recruiting Players
I found a super new Java SMP that is basically vanilla and only a few days old.
It has no major mods or plugins so it feels simple and normal survival.
Voice chat is encouraged but it is not required. There are around 15 people in the Discord and you can get whitelisted by dropping your ign after you join.GG.MINEWIND.NET New Server IP