My wife and I split duties for the first 5 years with 3 kids in that time , shortly after I took over as Stay at home dad. Helped her get a contract at work and do a masters program.
I do all the stuff the Spiter posted and more.
I also self manage a rental that I built while the kids were little and recently remodeled it, take care of our a big house inside and out , a very big property with everything from killing gophers to tractor work when needed, do most upkeep and car repairs on three cars, (very few females ever did that). I handle almost all clubs and sports. Pick up kids from 2 different distant charter schools. Wait around a lot because it's to far to come home between many events. I handle everything with the pets.
Lots of time to run and go to the pool/gym during soccer when I get stuck waiting around.
I manage to go fishing twice a week while kids are at school, or now that they are distance learning, no problem.
My wife does help inside the house and bill paying a bit during the week when she can and a lot on weekends, other than that it's me.
I still think I have it pretty good compared to a 40-50 hour a week job where I would end up doing half the stuff I do now anyway.
My kids were not better or worse at any age. It has not been harder , or easier at any age. That stuff just sounds made up to me.
I bring more value than most typical stay at home moms because of the high dollar things I take care of( building houses and stuff like that) . Yes , I know a lot of people do some of those things on top of their jobs . In that case, a stay at home parent who only did the historically normal female stuff would have it a lot easier.
Someone working and doing the extra things I do could never give the quality of nurturing, support and guidance, I have done. So somebody has to do that or not , I guess.