Low Progesterone After 1 Year of TRT

Wanted to see if I could get some opinions on possible causes for low progesterone after starting TRT.

Progesterone was normal when tested for low T originally, but testing for progesterone wasn’t completed again until my 1 year labs just recently. Doc prescribed a cream which I just started this week.

Iron and Vit D was barely in range when I started TRT, after both became severely deficient.