Works fine but
I must write in white search box - PLAY (for Play Poland) and selected it
Then i click on ACT to enable and save it
Now volte and vowifi works fine, incomming call are recognised again
I have the same problem on Volte and VOWIFI with unknown caller. But I fix it easy.
*#*#663368378#*#*
Choose MBN Config.
Select SUB0 for sim1
Choose search - write there your operator
Select your country/operator
Click ACT
My example on Poco F4 Munch
Now incoming calls works fine. No unknown...