Call Waiting Ringtone in Android 10

A week ago, I upgraded my Max Pro M1 to Android 10 AOSP .424 Version.
Call waiting function was enabled.
I got a normal telephone ring while I got a waiting call and that make me unable to hear voice of existing caller.
Earlier (Pie) Call waiting ringtone was used to be Beep sound.
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Comments
I think this is an error caused by your local network provider. The wait order can only be changed when you subscribe to the service of your network operator