Why is my player character sliced in half

Godot Version

4.6.2

Question

So I was following a tutorial for Godot and a different person on how to make a character in blender, in that the person mentioned trying to mirror the over half (which in this photo here is gone).

Later the Godot tutorial put his model into his game and the left side the scene tab was a lot smaller than mine, but most importantly his character was not sliced in half. I wonder how do I fix these and why my player character is acting like this? (I know the character doesn’t look great)

it was exported to .glb

Blender does not apply modifiers to exported models by default, you must enable that setting in the export dialog

Thank you very much!