For those want cheap UV glue clear tempered glass can checkout this link on shopee:
https://shopee.sg/3D-UV-Liquid-Temp...tte-Privacy-UV-Glass-i.1201454555.24716997514
I am not afillated/related, just bought 4x and applied myself, quite easy to do yourself. Just have tissues to be prepared to clean up excess glue.
Protip: try to make the phone flat on surface, otherwise the glue will run off the screen. I wasted one uv glue bottle because all run off screen. Also consider taping off the speaker grill area with scotchtape if you want, some excess glue can go in there.