My chewing muscles bulge when I clench my molars. Can I get square jaw Botox and contouring injections at the same time?

Maybe it's because I have a habit of frequently chewing tough snacks or unconsciously clenching my teeth when stressed, but when I tense my molars, my masticatory muscles bulge out, making my lower face look angular. On top of that, there is a slight buildup around my jawline—whether it's swelling or fat—which really bothers me because it makes my face look dull.

I am looking into Maypure square jaw Botox because I want to take this opportunity to achieve a smooth V-line. I am wondering if it is safe to get the Botox to reduce jaw muscles and the contouring injections to smooth out jawline fat on the same day. Will treating both muscle and fat simultaneously create a greater synergistic effect for jawline refinement?

Please let me know how long daily inconveniences such as weakened chewing ability, bruising, or swelling last after the injection, and whether the slimming effect on the face line usually becomes visible from about a few weeks later!