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