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