Flutter TextField inputFormatters not wokring with my custom regex

I want to allow this kind of input to my text field:


so I created and tested RegExr website this regex:


but when i try to type nothing is typed in the text field

code of using:


     keyboardType = TextInputType.phone;

     // to allow digits with asterik and hash
     final regex = RegExp(r'\**\d+\**\d+\#?');

     inputFormatters = [FilteringTextInputFormatter.allow(regex)];

     return TextField(
      keyboardType: keyboardType,
      inputFormatters: inputFormatters,

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