I can't add much yet as I'm only 41, but I've often wondered the same.
I had an easy time with hormones as a teen - no acne, no mood swings. I was the most even tempered teenage girl going.
I've never had pmt or pms as an adult and pretty much sail through my (light, regular) periods every month.
I've not had kids and never felt broody.
I feel like I'm just not a very hormonal person?
I'm on hrt because of a bout of insomnia, which I wondered if it would help, but I now think that was actually caused by something else which has now been resolved.
I'm going to stick with it as I want the benefits to bone density, skin and hair.
I've had a massive upsurge in sex drive in the last year, which is the most hormonal-feeling thing that I've ever experienced, but I wonder if that's more a stage of life thing and not so much about hormones actually - feeling confident in who I am and what I want, loving my body, and generally thinking I'm a 10/10 queen! 😅