Not a rain test but it seems folks are concerned with washes too so this test works for that to a degree. I never use an automated wash so garden hose is my go to.
I think I may try a little flat weatherstrip in the front.
Got them here https://imp.i128439.net/ZdvPNq
These are Cal Trends. They have the quickest build estimate and I got them sooner than expected
there's other choices of materials and brands ...skim the catalog here: https://imp.i128439.net/0JMkPM
I'm not a fan of cloth seats and I ceramic coated them but I'd always get shocked
I installed new covers and no more shock plus it adds more cushion
Pick up the diamond seat cover here:
https://realtruck.com/p/caltrend-diamond-quilted-seat-covers/v/ford/maverick/2022/
there's other choices...