iam using miui v13.0.5.0 SGKMIXM by xiaomi.eu on my redmi note 11 nfc,i didnt flash any patched boot.img,just flashed TWRP recovery,then in TWRP-advanced-flash current recovery,then reboot phone back to recovery,then flash latest Magisk,then format data,then reboot to system,everything works...
install this https://drive.google.com/file/d/1EfGzKGDrXS8qfj8cHbJs7m17OUblubpv/view ,boot to TWRP recovery,wipe dalvik and cache,wipe Data-yes,install Rom -reboot,its a unified Rom for Poco M3,Redmi 9T ...called juice
i recommend to use PC with windows installed.Did you download the cutom rom or whatever rom you want to flash?if yes put the downloaded rom to your sd card...