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