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