My friend broke his iPhone X back glass once. Apple quoted RM1.5k something back then.

He got it fixed outside at some random phone shop who said can change can change but ended up using tools to pry and scrape away the back glass and glue on a replacement. The phone ended up looking damn ugly and the stainless steel bezel scratched up bad due to the prying and scraping.

Heard say the back glass is like permanently attached to the chassis. Not sure how they fuse glass and stainless steel lol.

My advise : go get a skin and stick over it cannot see the crack. And use a case. Skin can get from mojoskin. Their skin quality quite good, lots to choose from and price is reasonable.