Hi Rachel, I have the same already at only 7 months post op.
I’ve complained about it to the surgeon but he said he couldn’t see it, then when I pointed out it was massively obvious on both boobs he said it was normal rippling….. it blooming well isn’t!
I don’t have any suggestions for you other than to go back to the surgeon and insist it is looked at properly. I’m in the process of trying to get it sorted out at the moment. xx