My Note 10 + doesn't have one single mark on it. Thats from being used since its release date. Looks new out of the box. My Note 20 ultra has the Whitestone dome protector on front. and I bought a tempered glass for the camera module which covers the glass. Always cased I have a little change around with cases. I was using the I - Blason cozmo case at the time when I noticed the corner on the camera module on the frame there is 2 tiny marks. How? i have no idea but I'm guessing its from being put in my coat pocket and zip caught it. It' so annoyed me. Even if it is the smallest marks. I haven't notice any difference with photo quality with one on the camera, I have read that others do.
I am a Photographer and got a Note20 ultra... I had tried one glass for camera glass protector... I didn't found the difference with nd without protector but I took it out becoz I have a cover with good protection hump and I wanna use my Note20 Ultra to it's limits... if you wanna buy then I have a link here in Amazon. https://www.amazon.co.uk/dp/B08C5B7PVJ/ref=cm_sw_r_cp_apa_i_N5ONFbF90XGMP