Island Pillager Outpost + Monument @ spawn
Minecraft Seed: -2739867769226734960
You will spawn on a tiny island, right next to an ocean monument. There are many small islands scattered throughout the deep ocean, with a large amount of bubbles too.
If you travel over to 305X ~ 310Z, you will end up at a pillager outpost as an island itself, and there is also a cage out towards the ocean.
This seed works on the 21w08b snapshot, not guaranteed to work on others.