This is not tru.
You can do Everything what you wont with you phone. we still have a rootet phone right?. So I gonna repeat it again, i had the same problem in friday.I lost all day to fix it. What i Do:
1. download MiFlash tool
https://www.xiaomiflash.com/download/ or here
https://xiaomiflashtool.com/download/xiaomi-flash-tool-20191206 i download from second site its new version theare. After dolnoad you uznip the file and if no have folder "log" there you must create it.
2. download Global rom
https://c.mi.com/thread-2129825-1-0.html Enter in fastboot mod
3. With MiFlash tool flash the global rom ok. But be careful put Clean all
https://prnt.sc/rda8ot
4. after that i restart your phone.enter in fastboot mod again, install TWR via platform tool
5. reboot enter in TWRP install Orange fox
6. I install previous version on eu rom xiaomi.eu_multi_HMNote7_20.1.21_v11-10
7. done
Everythong work again with no problems.
So Let`s Flash