If I'm understanding you correctly then I think I have the opposite issue but...it does sort of tie in. I've been diagnosed formally (per se) with alexithymia. It's not really thought to be a medical condition so much as a personality construct.

I have emotions and feelings but I have a hard time putting words to them and describing and distinguishing them, one from the other. I also have a hard time seeing some of the emotional content in the things that I do. But anhedonia is more like a lack of enjoyment...I enjoy things but I think it's hard to experience it specifically when I enjoy everything because I'm so happy-go-lucky by nature due to being eternally unbothered lol

I think the personable nature of the ENTP could contribute to anhedonia. You spend so much time being a man of the people that you find you don't enjoy anything because you're ultimately not being yourself even if it's not all an act

People frequently describe me as difficult to get to know and emotionally detached...yet I'm also described as candid and open at the same time. Injustice towards me or others is about the only thing that irritates me to the point I'd vent about it and I'm okay with showing more shifty emotions that come and go but I guess not the general state of where I'm at. I don't know how that matches up to everyone's experience but that's mine

But, my case is kind of off. I'm a survivor of severe child abuse and it has definitely warped the way I experience emotions and not helped my alexithymia but it is getting better.

I do remember deciding to not show any emotion when I was a child though. I consciously decided not to show any emotion as a way of giving myself the upper hand as I saw it. I just never stopped it seems