Here is the full list of all 20 Survival: Fountain of Youth Playtest achievements.
Faint 10 times
Spend 10 hours in game
Build a Water Collector
Build a Chemistry Workbench
Build a Kiln
Build a Cart for transporting
Faint for the first time
Craft a bow
Unlock 50 recipes
Find a Сlay Piece
Kill a Jackal
Spend 2 hours in game
Find an Obsidian Shard
Find a Sea Resources
Catch a fish
Craft a Spear
Kill a Boar
Unlock 20 recipes
Kill a Turtle
Survive the shipwreck