All links

Main telegram channel for this device: https://t.me/lenovotbx306xchat/1
Telegram channel for GSI downloads: https://t.me/lenovotbx306xchat/7513
How to unlock bootloader: https://github.com/mkr-infinity/Guide-to-unlocking-bootloader
TWRP recovery (optional): https://xdaforums.com/t/recovery-tb-x306x-android-10-unofficial-twrp-3-7-lenovo-tab-m10-hd-2nd-gen.4606369/
vbmeta.img: https://dl.google.com/developers/android/qt/images/gsi/vbmeta.img
Lenovo Rescue and Smart Assistant (RSA): https://support.lenovo.com/in/en/downloads/ds101291-rescue-and-smart-assistant-lmsa
Video for the steps after 8th step, for rooting: https://youtu.be/OKYE4856q2s?si=hKkRLjANZnOLFFFV