A stack isn’t a tree

That’s right. Welcome to you’ve been wrong all along.

2 2 3 + / has no parentheses,

(2+3)/2

get your eyes checked.

You think the binary trees look different?? It’s you who needs to get your eyes checked! 🤣🤣🤣

2 3 + gets resolved when it happens

Due to being in brackets, as per the binary tree for the 2 different notations for the same expression.