Can I get a hair transplant while taking testosterone replacement therapy? (Photos)

Hello, I am on TRT. Since being put on TRT I started losing hair. However, TRT has helped in quality of life (40 years old). I don't want to stop TRT and don't want to take finastride if I do get a hair transplant. 1. Should I wait to see how much hair loss will come with TRT? 2. Would I require more than 1 transplant if I didn't wait? 3. Is it OK not to use finastride due to it's affects on my TRT?