I found a Bedrock Realm that has been running for over 2 years and it is a survival SMP style world. It keeps the vanilla survival feel but it also adds some extra stuff to make it more fun.
There is an economy with shops so players can trade and set up their own things. It also has a TPA system plus ranks and auctions so you can move around easier and mess with the market.
The vibe is chill and friendly and it is about making memories and building with other people. Their Discord is really active with over 1,000 members so it feels like there are always new people around.
They also do daily updates and giveaways and they want you to meet new friends and just have fun.