Make sure you check you trailer lights. I went to tow my bass boat a couple of weeks ago and the trailer running lights didn't work. Checked all the fuses, hooked the trailer up behind two other trucks, and the trailer lights worked perfect behind them, Ford F150 and a 2022 Ram 1500. I had one of my service techs contact Star and was he told this is a "know concern" effecting 2025 1500's, with "no current remedy". Apparently the new trailer light module has a pre determined amp load for each trailer light circuit, and if your trailer exceeds that amp draw, it cuts that circuit off. My trailer is pulling 15.3amps on the running light circuit, and the truck decided it was too high. Keep in mind the fuse for the trailer light circuit is 25 amps per side. I hooked up my ski boat and got the same result. No running lights. And again the ski boat trailer lights worked perfect behind a 2022 ram 1500.
As far as the actual towing, the truck did very well, except it sags the rear suspension a little more than id like it too.