You need a new TWRP, I use TWRP 3.4.2b-1206 from wzsx150 for the umi here the link for download https://drive.google.com/file/d/1KEyu-pBCnxDRWTL3TlNZrovsIzqrvmpl/view?usp=sharing
I think you need from LR Team https://mifirm.net/model/ginkgo.ttt#twrp latest, or Orange Fox when you have willow Phone.
https://forum.xda-developers.com/t/official-recovery-ginkgo-willow-orangefox-recovery-project-r11-0_1-stable.4061681/
it is decrypted and directly usable like any other twrp, USB-OTG does not work and neither does sideload, it would have been better to wait for a new version that supports Android 11 100%
No, you can`t use the updater app , you must download to PC and flash the Rom as update NOT FORMAT DATA, after download the 12.5.5.0 to pc, unzip the rom, boot your phone to fastboot mode use the stock usb kabel and use the "windows_fastboot_update_rom.bat" to update your rom.
when you have twrp install like poco F3
1. fastboot boot twrp.img
2. copy that same twrp image to the device
3. go to Advanced > Install Recovery Ramdisk
after 3. you have to install magisk new