Did you look at the link? Most of those were 20 lbs and under.
I didn’t link the Australian Stock Saddle Company, which makes excellent saddles, because those tend to be heavy. My much loved Muster Master from that company is 25 lbs., which is getting too heavy for me, and is too narrow for my new horse. I rode up to four hours at a time in that saddle with my previous horse, was never sore or stiff after a ride.