The lower part of my face looks wide. Can someone in their 60s get a consultation for jaw Botox?

Hello. I am an office worker in my mid-60s.

Lately, when I look at frontal photos, the lower part of my face looks angular and wide. I think it looks even more so because my jawline has become less defined. I'm uploading a photo along with this.

I've had a bit of a jawline since I was young, but as I get older and my cheeks sag, it's becoming more prominent.

I'm wondering if jaw Botox is effective for refining the facial contours even at this age. I'm also worried that it might actually make my cheeks look more saggy.

I'd also like to ask if it's better to get it done together with a lift, or to get them done one by one.

I would like to know if there is any discomfort when chewing food, when the effects appear, and how long they last.

Since I am still working, I am also curious if injection marks or bruises remain. I would appreciate it if you could let me know in detail.