Concerns About Hair Transplant Results 12 Months Post-Op

I had hair transplant done 12 months ago, specifically on my crown. In your opinion, do you think there were enough grafts placed. For what reason could it have failed? Doc says that “my native hair is going”, but i don’t think so. I’ve been taking medication and using minoxidil. My hair looks exactly the same as before the hair transplant. What’s the reason for it?

Photo before hair transplant:

Photo right after hair transplant:12 months later:

Photo right after hair transplant