Just adding to the current CarPlay issues.
15 Pro Max, cabled only CarPlay (head unit doesn't support wireless).
Was working fine in 26 and 26.1, right up until 26.2 beta 1.
Beta 1 wouldn't immediately connect; I'd sometimes have to unplug and plug the phone in a couple of times before it worked, but then once connected it would work with zero issues for its entirety.
Once 26.2 beta 2 was installed, CarPlay would no longer work at all. The phone charges via the USB cable without issue, it detects the cable fine. If I plug the USB in the non-CarPlay USB port, the head unit pops up with a message that it's not supported, so the head unit is working fine too.
Installed beta 3 and issue remains; CarPlay is completely dead. Tried a different cable, tried turning off any and all VPNs, still the same. The reason I tried without VPN is because I have Adguard installed. This is not causing it however due to having Adguard installed since I've owned the phone, and not once ever had an issue with CarPlay working with it, as it's turned on 100% of the time.
So yeah. Here's hoping for next week's update and hoping that fixes the issue.
I've raised a feedback ticket, and have been lodging feedback absolutely everything since iOS26 beta began, and will continue to do so.