I'd just like to share my story about vaginal oestrogen.
Before I started patch HRT, I decided to try vaginal oestrogen first to see if that would help with painful intercourse due vaginal atrophy brought on by the menopause.
My (younger) husband is a health and fitness person who is super toned and fit. Weeks into me starting vaginal oestrogen, we both noticed he developed gyno, i.e. man boobs. They were clearly a new thing and he had not changed his diet or lifestyle.
I stopped the vaginal oestrogen and his gyno resolved after a while.
I never used vaginal oestrogen again and have been on alternatives.