All of these are songs that he would play and sing at the same time. Any that are not in piano, he would write music for to translate it to piano.

Drown by Bring me the Horizon- Cover by Faith Marie

Iris by The Goo Goo Dolls

Bad Life by Sigrid and Bring me the Horizon

Little Freak by Harry Styles

Dying in LA by Panic at the Disco

This is Gospel by Panic at the Disco

Overfly by Luna Haruna (SAO is one of his favorite animes. He doesn't always sing along to this one but when he does, he sings in Japanese)

Pretender by AJR

Ophelia by The Lumineers

We Might Fall by Ryan Star

Appalachian Wine by Eleventyseven

Rescue by Lauren Daigle

One More Light by Linkin Park

Talk by Coldplay

Love is Gone by Slander

Someone You Loved by Lewis Capaldi

100 Years by Five for Fighting

Before You Start Your Day by Twenty one Pilots

A Thousand Miles by Vanessa Carlton (he definitely learned this because the piano sounded really fun and he unironically loves it)

Therapy by All Time Low

Family Line by Conan Gray

Might*U by Yuki Hayashi

Falling Apart by Michael Schulte

Golden Hour by JVKE