for_loops_in_flutter_go_round_and_round.dart

Checkbox(
          value:  ref.watch(boolNr1.state).state,
          onChanged: (value) {
             ref.watch(boolNr1.state).state = value;
          },
  ),
Checkbox(
          value:  ref.watch(boolNr2.state).state,
          onChanged: (value) {
             ref.watch(boolNr2.state).state = value;
          },
  ),
Checkbox(
          value:  ref.watch(boolNr3.state).state,
          onChanged: (value) {
             ref.watch(boolNr3.state).state = value;
          },
  ),
  ....

provider.dart

final StateProvider<bool> boolNr1 = StateProvider((ref) => false);
final StateProvider<bool> boolNr2 = StateProvider((ref) => false);
final StateProvider<bool> boolNr3 = StateProvider((ref) => false);
...