can you please add support for VOLTE in Israel

[chaimsha]

hi
thank you,
I just wanted to understand, isn't it enough that I install the APK from here https://github.com/kyujin-cho/pixel-volte-patch/releases/download/1.2.8/dev.bluehouse.enablevolte.apk

That is, do you have to install according to the order you wrote or if you install the application then everything is already installed there,

Also, can you please add support for VOLTE in Israel, I have an Android 8 phone and it only supports VOLTE in Europe, I will attach a link and more details about the phone if necessary.
Thank you very much