Same problem with me. I actually looked to see if I hadn't removed some packaging. Awful buttons. Hopefully they will losen up but for now buttons definitely can't be used one handed.
Also thinking of returning the cover if it doesn't get better after a few days.
YES. Definitely is harder to press. I work at a samsung retail partner store and a customer came in with this exact issue. tested different smart view cases and same issue. I own an S22 ultra with a smart view case and unlike the s23 ultra, the buttons click in with ease.