Is square jaw Botox a procedure that significantly changes the face shape?

My jaw muscles are on the more developed side, so the lower part of my face looks a bit angular in photos.

I can also feel the side of my jaw protruding hard when I clench my teeth.
I wondered if I got that face shape because of my muscles.

So I'm looking into square jaw Botox.
It’s a bit fascinating to hear that the principle is to soften the facial contours by reducing muscle size.

However, I don't want my face to become too slim either.
I just wish the angular feel was softened a little.

Those who have actually received square jaw Botox
It would be helpful for me to make a decision if you could let me know how much your face shape has changed.