I bought a 2020 F150 Sport 10 spd with the 5.0 and 44k miles. Bought CarMax's extended warranty. I recommend you buy one too. Here's why:
I've always been a Ford guy. The new 5.0 is not the 5.0 of old. The new 5.0's have a tendency to burn oil, so be sure to keep an eye on that dipstick. Mine burns a qt every 1,500k right now, which is probably pretty normal. However, I know some not as lucky and have had to have their engines replaced. Ford told one guy that the cylinders were out of round at 60k. Not normal. Read some F150 forums and you will see what I'm talking about.
I really like this truck, it's a fun drive. It pulls my 20 foot flatbed without any issues.