For me this worked

1. flutter pub cache clean
2. change the pubspec.yml sdk: ">=3.0.0 <=3.24.5"
3. url_launcher: ^6.3.1
4. cd ios
5. pod install (delete the lock file)
6. flutter run

This will cleanup any cache of old url_launcher and get new one i.e. 6.3.1 and it will work.