The only means of upgrading Android on the Pro1x is to flash Lineage OS, an ASOP-based alternative. The current official version is Lineage 22.2, which is AOSP Android 15.
https://download.lineageos.org/devices/pro1x/builds
https://wiki.lineageos.org/devices/pro1x/install/
https://community.fxtec.com/topic/4223-lineageos-22x-official-release-for-pro1-x-qx1050/