Volvo VNL Swaying & Bouncing

Hey guys, I have a 2015 Volvo VNL daycab with a D13 I purchased last year with 420k miles. It ran amazing for the first month, after that it started to become a very uncomfortable ride, I've replaced the seat, cab airbags/shocks, shocks all around, the torque rods. Replacing these things made driving the truck more manageable but then it got worse over time, so recently I replaced the tires, the leveling valve for the cab, kingpins and bushings, front shocks(again) got a slight alignment done on the steer tires, bushings for the bracket that holds the cab to the frame in the front. Right now, I'm waiting on an actual alignment and balance here on the 1st of August. The mechanic has checked the drive shaft and said it was good. It's bumpy regardless if I'm bobtail, empty, or loaded. I think it's felt more when empty. My steering wheel does vibrate a little and also steers to the sides. I could be driving on a straight flat road and still feel the bouncing. Hopefully the alignment and balance fix the issue but if not I'd like to hear what you guys think!

I'm wondering if I've missed anything or if anyone has had similar issues, any advice would be appreciated, it's my first time owning a volvo and I hear they are very nice comfortable trucks. Thank you!