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