Will confirm the CX-5 in a couple of hours.  Just did the upgrade on the olds and got home to see this about the vehicle.  

Carplay seemed to work ok in my Mazda 3 (MZD Connect), the dealer did at my last service upgrade the head-unit firmware version to 70.00.367 if that is of any help

@alasta Both wireless and wired CarPlay works fine on the 2021 CX-5 with the 8” MZD infotainment screen with iOS 14.8 on iPhone X.

Thanks everyone for reporting back regarding the Mazda system. I will proceed with the update now as it sounds like the problem is likely to be isolated.

late to party, forgot to post.

2019 CX5 no issue

2020 CX5 no issue

I meant to update this to confirm that I did the update last week and CarPlay worked fine when I used my CX-5 over the weekend. So, whatever the problem is it's clearly not widespread.