High AMH?

Ca

I have started an infertility journey with my husband and I recently had an AMH year completed. I am 35 years old and my AMH level was 9.94 no/mL. My OBGYN office said this is really good. Everything I’ve read is that 1.0-4.0 is good and my number may be high (which can be a sign of PCOS). I’ve been fairly regular with my cycles except the last one. But ovulation has always be indicated on my chart including this last cycle (which was super off but I was also diagnosed with hypothyroid). Can anyone explain AMH to me? Should I be concerned or happy about my level? 🥺