Great. I just got a 2018 SCREW myself - was worried about the pano roof myself, posted on here about it, but ultimately I got a 100k warranty & figure almost every "loaded" SCREW F150 has the pano roof, Ford sells a helluva lot of F150s....my guess is the vast majority have no problems....and seems like the problems that were popping up had alot more instances in the 2014-2016 years, that it had more to do w/ the moonroof malfunctioning/getting stuck in a position & the rails failing than it did w/ them leaking.
I do think it is worth checking the moonroof drain tubes - that is a common problem on sunroofs (particularly fords too - my buddy had this issue on a Lincoln LS) - on the other hand very common for ALL trucks to develop a 3rd brake light leak (happened in my Sierra & my buddy's Ram) - also I think it is common for leaks to develop around the sliding rear window and/or the entire glass panel in the rear of the cab.
I will add that in my Sierra at least the water leak from the 3rd brake light was seen around the headliner not the floor - but different truck & depending what angle you were parked on could go any direction I suppose.
Leaks are one of the worst problems IMO on a new vehicle, can really sour the ownership experience, leave you w/ low confidence in the overall build quality, & damage a nice/expensive interior while simultaneously making it stink
On the bright side the trucks made out of AL, won't rust, & you have a warranty.