First I would double-check the wiring and connectors, and wiggle the appropriate fuse/s. Wiggle any connectors at the top of the pump. I might also attach a jumper wire with aligator clips from the frame to the fuel pump assembly ground ...or at least verify with a meter that the ground at the connector is 'good' ..and see if that makes any difference. Before you dig into the job. It may not make a difference, but worth 20-30 minutes of troubleshooting in case you happen find a rodent-chewed wire down to 1 strand of copper, or a corroded connector wire or what have you. Are there any Youtube 'fixes' for the fuel gauge?
2019 is pretty new. Lot of miles left. If it were me, I wouldn't consider anything other than OEM pump/gauge assembly on a 2019. Esp a critical part ...when you commute 50 miles a day. But that's just me. 8x out of 10 OEM beats aftermarket on quality from my experience. Yeah, it's a lot more $, but you can just about guarantee after you put a Mopar part on, the gauge will read correctly and it'll work fine, presumably for many years. These days with aftermarket parts being what they are, gauge variability wouldn't surprise me in the least. You'll find that wrestling with a fuel tank (fuel will slosh to one side and go off-balance), and changing the fuel pump can be kind of a SOB of a job. That would totally blow if you installed an aftermarket pump and the gauge was off due to a cheap rheostat.
Fortunately for you, your truck's bolts shouldn't be very rusty and probably not a lot of crud on and around the tank ...like on an old truck (bonus). The worst is working on old rusty tanks where crud is falling down into your face.