I encountered a problem when creating a UI in Godot.
I changed the text size, but I found that the size of the button did not change accordingly.
I adjusted the text size in Theme Overrides → Font size.
I can’t use scale to resize it, as it would reduce its resolution.
The CheckBox node use textures to render the icons. You’ll need to supply bigger textures if you want to change its size. You can see which ones you need to supply in the CheckBox theme properties