Not working while trying to parse utf8 unicode data.

[naeem-shah]

I have unicode data i am trying to parse.

I have following regex (?<=ژژ).*(?=ژژ) its working fine on regex101 as you can see following image.

I am using following code:
ParsedText( text: ''' ژژ صفحہ نمبر 15ژژص ژ1 ’’وَلَقَدْ اَرْسَلْنَا نُوْحاً وَّاِبْرَاہِیْمَ وَجَعَلْنَافِیْ ذُرِّیَّتِہِمَاالنُّبُوَّۃَ وَالْکِتٰبَ فَمِنْہُمْ مُھْتَدٍ۔وَکَثِیْرٌ مِّنْہُمْ فٰسِقُوْنَ۔ ثُمَّ قَفَّیْنَا عَلیٰٓ اٰثَارِہِمْ بِرُسُلِنَا صژص ژ8 (حدید:۲۶،۲۷)‘‘ صژص''', style: Get.textTheme.headline6, parse: <MatchText>[ MatchText( pattern: r'(?<=ژژ).*(?=ژژ)', style: TextStyle( color: Colors.red, fontSize: 24, ), renderText: ({String str, String pattern}) { Map<String, String> map = Map<String, String>(); RegExp customRegExp = RegExp(pattern); Match match = customRegExp.firstMatch(str); map['display'] = '\n'; map['value'] = match.group(2); print(match.group(1)); print(match.group(2)); return map; }, ), ], ),