Generally speaking higher body fat will lead to higher estrogen (rather than the other way round).
Lowering estrogen isn’t going to help you lose weight in those areas unless you have gyno (which may be too far gone to address simply with an ai) or you are actually just holding a lot of water (which is a side effect of high estrogen).
i would get it checked along with your testosterone as hormonal imbalances can absolutely affect fat loss but low testosterone is the bigger culprit. The one I would definitely check is cortisol, that directly affects your bodies ability to store fat - high cortisol will be more of an issue than anything.
but in reality, this is most likely a diet issue (I’m saying this just from having being through major weight lose myself and training many others since) and/or down to the fact we all have areas we hold fat until last. For man it is often the lower stomach but if you have been very over weight the chest is also likely as the skin will be loose and makes it look worse (loose skin may be impacting this -if you check my summer cut log you’ll see me with abs but fat looking pockets on the chest and lower stomach
)