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