Creepers that spawn naturally or trough Spawn Eggs appear supercharged. They do not explode like a supercharged one, so it's a texture error.
This problem may occur because Nintendo Switch 2 translates Nintendo Switch graphical instructions and may display some games incorrectly, in this case rendering a texture that shouldn't be rendered. as of my tests this only happens on Nintendo Switch 2.
This issue is being tracked at MCPE-217361.