I got the 22.10 update by SPS and backed up the USB update files.
Is that vehicle specific?
Anyway, it's here.
Warning: I'm not responsible for any damages caused. Format you usb drive with FAT32 and copy all files in the folder to the root of the drive.
Plug into your vehicle in park and follow the onscreen instruction.
(It may or may not work since I don't know if the update is locked to one vehicle, but I don't think they will do that...)
I also noticed that, after updating to 22.10 from 22.9, you can
no longer use ADB to install any custom android app by enabling USB debugging in developer menu
(To enable hidden developer menu, click version number in about menu several times)
I have a usb-c to usb-a cable and a laptop with usb-c ports, so I can connect to the center console with ADB through USB connection. GM seems to lock the adb tool down to their GMAuth tools only. Well, the system is still based on Android 5.1.1