VitaNova is a semi vanilla SMP that tries to keep the normal Minecraft feel but adds a lot of extra stuff to work toward. It supports Java and Bedrock together and it runs on 1.21+.
The server has a growing economy vibe and it pushes progression with quests. You can earn rewards and unlock ranks just by playing and it is meant to be fully free to play with no pay to win locks.
Building is safer because you can claim land with a protection plugin so your stuff is harder to mess with. There is also a custom world to explore with custom structures to find.
If you like grinding side systems there is custom fishing with rarities and tournaments plus upgraded farming and custom enchantments for combat and mining. They also mention regular events and an active friendly community.

