Is it possible to not absorb testosterone fully due to scar tissue build up at injection site?

This is one of the few things that I can think of as to why my levels are so low despite being on 0.3 mL weekly. I know bodies are different and stuff, I was on this dose about two years ago and it was perfect for me. Now it seems to be doing nothing. I’ve only ever really done injections in my butt though lol. I don’t have a lot of fat anywhere else. I wonder if maybe I’m not absorbing all of the testosterone because of years of injecting into my butt? Is this even possible? My levels are 302 the day after my shot. I had labs done last Tuesday, and did my injection on Monday. I do alternate sides every week, but I wonder if I should switch injection sites altogether.