Here is the full list of all 31 Yoku's Island Express achievements. It takes around 10-12 hours to unlock all of the achievements on Windows.
Hatch the God Egg
Collect all Wickerlings
Activate all Scarabs
Unlock all treasure chests
Collect every ability upgrade
Try every ball style
Complete Thorn quest
Complete Rinri's quest
Get the biggest wallet
Become the Postmaster
Discover Fosfor’s Lair
Complete the story
Unlock all the Beelines
Complete Willo's quest
Defeat the Spider
Befriend a Sootling
Defeat Screetch
Deliver the cake to the inventors house
Customise Yoku’s ball
Complete the temple trials
Discover the heart cluster at the bottom of the sea
Collect the Divefish
Toot the noisemaker 1000 times
Ride the Beeline
Save Spina
Take the surviving egg to Dipperloaf
Suck up a slug with the Slug Vacuum
Find the Post-office
Free Kickback
Toot the noisemaker 100 times
Blow the noisemaker