[Botox] I got Botox on my salivary glands and chin.

I've been taking it consistently for almost 3 years, and the treatment cycle is getting longer. Recently, my jaw line seemed to have been crushed, so I was getting Xeomin on my salivary glands and chin, but I don't know if it's my mood, but the effect isn't as obvious as before. The hospital itself is a problem. (They also confirmed that Xeomin is genuine), but I am worried that I may have developed a resistance to it. Is there anyone who is worried about resistance like me?