Hi, the plastic protector underneath my engine has come loose, 2 of 3 screws have come loose and gone, does anybody know if the garage would take this plastic cover off when they do a service?

I had the car serviced a month ago so just curious if anybody knows? I am taking it intomorrow morning and they gonna check it, the guy advised if it came loose from impact then it would not be covered under warranty and i know i have not hit anything, except when it the plastic cover scrap the ground which alerted me that something aint right underneath.