I’m quite certain it’s in your owners manual. RVs flex and move a lot and sealant technology is not great. I inspect my roof and sidewalls 3 or 4 times a year and it is somewhat unusual for me to not find something that needs to be addressed. The size of the hole in your case is irrelevant since the water shouldn’t have been able to get to it in first place. It is a simple matter to look at the edges of windows, fixtures and seams and determine if there is a uniform unbroken well bonded bead of caulk. It’s your responsibility and not Thor’s. Whether you accept it or not, it’s the way RVs are.
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