I'm using Godot Animation Player, since the sprite sheet only has idle_right, how do I get it to flip for idle_left?
I'm not really familiar with godot. In Unity there was a "FlipX" I think there should be something similar in godot too.
There is a flip_h toggle or you can add a .flip_h to your script for the left animation.
there is a flip H property within the sprite 2d that you can check to flip it