Minecraft wiki entry for Survival_in_an_infinite_desert, associated text: Build massive farms to produce all renewable items
Build massive projects
Conquer a bastion remnant
Take on a raid
Complete all possible advancements. (How did we get here, trident related advancements are impossible without cheats)
Do the challenge in hardcore mode or ultra hardcore
Respawn the ender dragon
Get every possible obtainable item and block
Build a netherite or diamond beacon
Get a full set of max enchantments netherite armor and all tools.