Mi 14 Ultra CN version HyperOS 2.0 update

[D. Plasman]

I bought a Mi 14 Ultra CN version. NCUnlock put the Taiwan Global version on it and so far it works OK. Now I want this phone updated to HyperOS 2.0. As far I can find on internet I only can flash this Phone in EDL mode. Does anybody know how to put the Mi 14 Ultra CN version in EDL mode.
Is there anotherway to flash this Phone? The bootloader is locked and for now not yet a way to unlock the Mi 14 Ultra CN version.
Any suggestions are welcome. Even the way to put it back on the original ROM.
Thanks on forehand.