Survival loot

Subnautica 2 Supply Crate Locations

Short answer: Supply crates should be treated as early survival and blueprint support markers. Known crate-backed entries include the Habitat Builder crate beside the Welcome Center sign and Wakemaker crates near Lifepod-area debris/outposts.
Open supply crates on map
Game8 All Blueprint Locations: Habitat Builder fragment inside crate beside Welcome Center sign

Supply crate by Welcome Center sign

-332634, 441264, -913 · shallow

low

Game8 All Blueprint Locations: Wakemaker fragment inside small crate near debris

Small crate near Wakemaker debris

-321162, 420919, -2335 · shallow

low