The phone need to be switched to diag mode.
Before doing this Mod you should backup EFS-partition !!!
Need to have adb installed and phone rooted. Open cmd window and type:
adb devices (check if phone connected)
adb shell
su (grant root)
setprop sys.usb.config diag,serial_cdev,rmnet,adb
You will find new device in PC device manager "Qualcomm HS-USB WWAN Adapter 9091", then PDC tool will recognize your phone.
More info here: https://forum.xda-developers.com/poco-f1/how-to/guide-activate-vowifi-wlan-call-t3871263