It's one of those 68RFE things unfortunately and will start to get better after some miles, but not perfect if you just jump in and drive without T/H on. I'm running the PPE flat bottom pan, the PPE extended filter that comes with an integrated metal nipple, and the PPE TBV delete. Normally Red Line C+ would be my go to RFE fluid, but I've been playing with the HSS Adrenaline Pro Shift +4 in this one and it does seem to have made some minor shift improvements (nothing earth shattering by any means). I also always run T/H mode which helps them a bit as I find the factory trans tuning just flat out sucks without it. Once emissions intact/on '22s tuning is more readily available I'll be seriously looking into Calibrated Power tuning and probably throw in a RevMax VB at the same time.
The RFE's aren't horrible and can be made a lot better, but from the factory they've always missed the mark IMO. They rush to 6th gear too early even though the OD's are the weakest point, shift too soft 90% of the time, and they should run a touch more line pressure IMO. If you've ever driven a 68RFE with a valve body and a tow tune worth it's salt it's like driving a completely different truck. I will give it to Ram that they did make some improvements to the '19+ units with the aux VB, but it's still got its quirks from the factory.