I would like to say to problem I occur, I have done this steps :
1
. Download TWRP
here
2
. Flash TWRP
3. Wipe Dalvik/Art Cache, Cache, System and Vendor
4
. Format data
5. Reboot to recovery
6
. Download CipherOS
7. Flash CipherOS using ADB Sideload
8
. (Flash
FW 12.5.4 if not already done)
but a big problem occurs, no ear sound when I phone call somebody, I have resolved this problem with the flash of
FW 12.5.4 and flash again CipherOS using ADB Sideload
so I thing the proper steps to install this ROM is to :
1
. Download TWRP
here
2
. Flash TWRP (fastboot flash recovery twrp.img)
if there is an issue to keep TWRP on recovery partition you have to "fastboot flash vbmeta vbmeta.img" from the following page
https://unofficialtwrp.com/twrp-3-3-1-root-xiaomi-mi-note-10-tucana/, don't forget to unzip it)
3. Wipe Dalvik/Art Cache, Cache, System and Vendor
4
. Format data
5. Reboot to recovery
6
. Flash
FW 12.5.4
7. Reboot to recovery
8. Flash CipherOS using ADB Sideload
9. Reboot to system