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