They adopted it at the OS level years ago (when iPhones started saving it as an option), but I think it's only been in iOS 17 Safari this year (i.e. in beta) th

They adopted it at the OS level years ago (when iPhones started saving it as an option), but I think it's only been in iOS 17 Safari this year (i.e. in beta) that Safari itself has started supporting it... (At least Safari 16.5.2 on Ventura 13.4.1 won't open .heif / .heic files for me).