I wouldn't worry about it either. I've owned a 2015, 2019 and my current 2021 all with the 6.2l and either the 8spd or 10 spd tranny with no major problems. There are many more that have no problems than those that have them. Usually people don't post the good things, only if they have issues to try to get help. There's differing opinions but I personally would take it a little easy during break in period, not sure of the trip your taking but I would avoid long stretches of continuous 70-75mph driving until you put 500 or so miles on it. Just one persons opinion.
Enjoy the new truck!