Not interested in sex anymore

Sounds like you need to have a frank conversation with him about how you feel.
He can’t fix anything if he isn’t aware. And if you tell him and he still doesn’t fix things or change how he approaches/helps then more fool him and you can do better.
I totally get the feeling of not being interested in sex but mine isn’t because my partner is sort of disconnected and leaves things to me. I don’t think he’s naturally that way inclined I don’t think men are very attentive as a sex not to sound sexist but I consistently state my wants and needs to him and he delivers.
End of the day if he wants to have sex then he needs to do the relevant things to get it, it’s not foreplay or anything like that when you’ve had a child. Foreplay sort of turns into a present partner who shares the load and puts you first

Tell him

No advice but hard relate x

Have your hormones checked. 2 years is right when they regulate but sometimes you may need to help your body. Check your estrogen, progesterone levels, vitamin levels etc… but also have an honest conversation with him

Solidarity

Definitely relate to this. I’m too exhausted after to wake up early because I breastfeed and it already is draining enough to do that that additional physical exertion like that makes me so exhausted that I sleep in late with my LG until 2pm and it throws our entire day off each time