I've noticed the soot load going up on the back side of passes and dropping climbing. The dash DPF gauge never shows anything. Climbing creates a lot of heat and could help with passive regen, coming down the backside it rapidly cools even with the heavy exhaust braking.
What I do know is two different identical 1,600mile trips, one with Archoil and one without, showed zero difference. Seems some don't believe that this actually happened. Maybe for city pavement queens Archoil does something, I didn't test that, only towing, the only real use for a diesel, where it did nothing.
Oh, the 2022 mileage and soot reports are extremely close to our 2018. Maybe I have two bad trucks from different years with nearly identical readings. The 2018 never made it 24 hours without a regen either. This might surprise you but at some point regen frequency goes up due to load and higher fuel consumption. With our trailer pulled by a 2018 HO and a 2022 HO the mileage and soot loading were very close. My neighbor that has gone on the same trip with a 2022 HO pulling 24k triple regens even more frequently. I believe he's around 8 mpg. This makes perfect sense, more fuel, more soot probably somewhat balanced by more heat for passive regen. I too have noticed this in heavy headwinds getting 7 or less mpg, soot goes up a bit faster. Heavy tailwinds at 12 mpg or so it climbs much more slowly. This might amaze you but generally more fuel burned, more particulates.
With a 7k trailer I probably wouldn't hit regens either until 24 hours, not enough fuel burned to cause a soot based regen. It's possible if I wasn't towing in mountains it might actually hit the 24 hour mark. Don't know, never towed with either truck anywhere but higher altitudes and/or mountains.
I can assure you, whatever you think, both trucks were doing exactly as intended.