Minecraft wiki entry for Nomadic_experience, associated text: Expand your base and add more villagers and animals.
Explore generated structures like temples.
Gather every single block and item.
Take on a village raid.
Max out all your villagers' trades.
Defeat a woodland mansion.
Conquer a bastion remnant.
Raid an ocean monument for sponges and prismarine.
Complete all the advancements.
Use Fundy's custom difficulties, such as Impossible, Impossible++, Nightmare, and Cursed. These will add challenges to your nomadic world.
Try Ultra-Hardcore or Half Heart Hardcore. You must not take risks!
Make a diamond or netherite beacon.
Try nomadic experience in SuperFlat, Caves, Floating Biomes, or Single Biome (preferably a challenging biome like desert or ice spikes).
Try nomadic experience starting in the nether or the end outer islands.