For sure. Saddle height as well but, this all assumes the rider is on top of these things. It’s a very subtle move. It’s easy to exaggerate too much especially with guys like me suggesting 20lbs belly button piercings.
Anyone still reading this and still confused it’s all just good posture. Think slouching while sitting at the computer. Now sit up straight and correct the slouching by putting a little more sway in the low back. Same thing on the bike. Chances are you are already doing it. Again this is very easy to overdo IMO.