They are, they still scratch though (just google e.g. Fenix 7 Sapphire scratches). It's also not on all models. I guess part of it is also just layers on top of it scratching and not the sapphire itself.

But, Apple Watch Ultras and also Titanium models since Series 6? ship with Sapphire crystal too.

Until I got to the Forerunner 965, my Garmins would easily scratch. I have an Instinct with such a deep gash I cannot see the top 1/4 of the display. The 965 display is wonderful but I still have a couple minor nicks.