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