Here you can see difference , Ellie's model in last of us 1 looks mature and understand Joel's decision and Ellie's model in last of us2 looks innocent and didn't know anything

I Thought The Last Of Us Was Better Than This - Game Informer

The Last Of Us Part 2: 10 Things That Changed About Ellie Between Part 1 And 2

The Last Of Us: 10 Unpopular Opinions About Ellie, According To Reddit

Was Ellie from The Last of Us based on Ellen Page? - Quora

How The Last of Us Would Be Different Had Joel Made A Different Choice

The Last of Us Part 2 review: We're better than this - Polygon

SPOILERS] In the game The Last of Us, at the end, was Joel's final decision for both him and Ellie the right thing to do? - Quora

So did they use 3 different face models? imho the 2019 one finally looks like an older Ellie and is astonishing : r/thelastofus

The Last of Us: Why HBO are Right Not to Use Lookalikes, by James McAndrew, Frame Rated

Riley Abel, The Last of Us Wiki