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
Collect every ability upgrade
Complete Rinri's quest
Activate all Scarabs
Try every ball style
Become the Postmaster
Complete Thorn quest
Unlock all treasure chests
Get the biggest wallet
Complete the story
Defeat Screetch
Customise Yoku’s ball
Complete Willo's quest
Deliver the cake to the inventors house
Unlock all the Beelines
Discover Fosfor’s Lair
Take the surviving egg to Dipperloaf
Defeat the Spider
Complete the temple trials
Discover the heart cluster at the bottom of the sea
Collect the Divefish
Toot the noisemaker 1000 times
Befriend a Sootling
Ride the Beeline
Save Spina
Suck up a slug with the Slug Vacuum
Find the Post-office
Toot the noisemaker 100 times
Free Kickback
Blow the noisemaker