I use these and they’re awesome for 8 bucks. Even protects the notch area and doesn’t affect how it works or speed of unlock. Would recommend if you want full coverage.

https://www.amazon.com/iCarez-Coverage-Tempered-Installation-Protector/dp/B07GQMF3Q8/ref=mp_s_a_1_15?ie=UTF8&qid=1543410704&sr=8-15&pi=AC_SX236_SY340_QL65&keywords=iphone+xs+max+screen+protector+tempered+glass