Downgrade Lenovo P11 Gen 2 TB350XU from Android 13 to Android 12L

Disclaimer

Only do at your own risk
I'm not responsible for voided warranties or bricked devices
I'm aware this isn't the best way to do this
In some steps I'm not entirely sure what I did myself, but I did end up with Android 12 on my TB350XU
Message me in the Android channel on the LaptopWiki Discord if you can't find necessary files, I will try to provide them to you

Avoid sites like https://romdevelopers.com
- Their downloads are paid and there is no guarantee of files working
- Stick to lolinet.com and needrom.com
You will need both of these
- TB350XU_S130348_240118_ROW.7z https://mirrors.lolinet.com/firmware/lenowow/Tab_P11_2nd_Gen/TB350XU/
- Lenovo-Tab-P11-2nd-Gen-TB350XU-23.zip (TB350XU_S020273_230717_ROW) https://www.needrom.com/download/lenovo-tab-p11-2nd-gen-tb350xu/ - VERY SLOW DOWNLOAD, it took me about 8 hours

Turn off your tablet
Extract both ROM files
Extract SPFlashTool
We will want to flash the TB350XU_S020273_230717_ROW, but that package is missing some files
Copy MT6789_Android_scatter.txt and MT6789_Android_scatter.xml and CheckSum_Generate.exe TB350XU_S130348_240118_ROW folder to TB350XU_S020273_230717_ROW\image
Run the CheckSum_generate.exe file
Open SPFlashTool in MTK_flash_tool_V6\MTK_flash_tool_V6\flash_tool.exe
Into Download-XML load TB350XU_S020273_230717_ROW\image\download_agent\flash.xml
If you generated the Checksum properly the ROM should load
From the dropdown select Download Only
1. DO NOT select Format All + Download, you might lose your IMEI number
Click the Download button
Connect you tablet (while OFF)
The flash should take about 3-4 minutes

The tablet acts like it's bricked, it isn't responding to inputs, charger etc
Force Shutdown the tablet. Screen is blank, but it isn't off.
- Power + Volume Down is Force Shutdown (on all other Android devices I have had it was just Hold Power), so hold that for about 30 seconds.
- Then turn it on with power button (or plug in charger and see if the Charging screen pops up)
If it starts bootlooping (Lenovo Android logo pops up, then it reboots), hold Power and Volume up.
- If you get a Fastboot prompt, you are okay, you didn't hard brick the tablet
- Turn it off by holding power button for 20 seconds or so
- Try the flash again
- I'm mentioning because this happened to me. Bootloop and a second flash = working Android 12 Tablet.
- If recovery pops up instead, use that to format the tablet
Reboot