Botox is effective for square jaws, right?

My face shape looks noticeably square. When I look in the mirror from the front, my lower jaw area looks particularly wide and heavy. I'm constantly told that my overall impression looks rough and harsh. Even after getting meridian massages or rubbing with a roller, the hardened knots don't shrink at all. Well, there is a temporary effect, though...

Will I look slimmer if I get Botox? I want to get Botox to get rid of this wide, chubby look.

I was also very satisfied with Botox.

I would like the excessive volume under my ears to subside, so that the line from my ears to my chin is refined into a smooth V-line rather than appearing wide and flat. I look forward to your response to my inquiry.