Ah- and Sidenote on "bricking"/restoring device: Lenovo offers an good "Software fix" software on their webiste that can restore your Lenovo device. You can install that, connect the tab via USB, give it the serial of your device, and it downloads the latest firmware and resets everything..the only thing tricky- as usual- I believe you might need fastboot mode at some point- which is POWER + VOLUME DOWN buttons at the same (USB disconnected) and then the lenovo enters fastboot mode and is ready a) to get out of this endless loops and b) receive the firmware. For me, it restored Android 11, the right one for UBports.