No it is definitely not scratch resistant. My friend scratched the metal part of the camera bar.
Only 1 way to fix this, paste camera lens protector, and buy a case which covers the metal area like what
@Loser suggested, else go to those store that sells custom cut back skin of the phone like Handphone Inspiration at Marina Square, buy a custom cut back skin from them, and ask them to apply for you which covers the entire back of the phone and the camera bar. I did that for my Pixel 7. With that, you can use any case you like