I normally trim my elevator for around ~5-10 m/s climb rate with hands-off flight and try to match my elevator/rudder so the little ball gets centered and I’m not spinning.
I’ve noticed though as I was trying to dive onto an enemy during one air superiority point that I couldn’t pitch down nearly as much as I’d expect my plane to do so. I imagine this was due to my elevator trim.
As such, I imagine it will be an obvious yes but googling gives me very little info on combat-flight trimming and I rather ask before logicing myself into a corner, especially since having a upwards pitch is pretty helpful for circling the sector waiting for enemy to show up.