People have been complaining for years. Apple sells screen protectors for this very reason. Apple typically will NOT replace your phone for cosmetic reasons when you could have invested just a few dollars to install a screen protector.
The simple reason for the phones being easier to scratch is they are now 4 time less likely to break in a fall. The physics of glass is glass which is harder to shatter in a fall is easier to scratch. In years past, people were highly agitated to learn it would cost hundreds of dollars to replace a shattered screen. A screen protector is significantly less expensive and can be replaced easily if it is scratched.
iPhone 11 last year scratched at Mohs level 6, whereas iPhone 12 scratches closer to Mohs level 7. Still, glass is glass. If you want to protect it, you put a screen protector on it. Over the last few generations of phones, a screen protectors has been installed on my phones before they were even powered on.
While this article is from 2018, it still applies today --> The Verge
And this about iPhone 11 --> Why is my iPhone 11 getting scratches?