Support Apple iPhone restore
My husband’s iPhone X at Apple logo endless rebooting we tried to restore it using iTunes after all it just says “support .apple/restore/iphone” on the black screen
iPhone X, iOS 13
Please refer to this link
https://support.apple.com/en-ca/HT203122
and if you already done all the instructions and your still facing the same problem, contact Apple Support or get an appointment to the nearest apple service centre.
good luck!