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