Irreligious Jew Saying Kiddush for Others

Kevod HaRav can a jew who is not shomer shabbat say kiddush for other Jews? Will the other Jews be yotzei?

A – He can say kiddush but Chacham Ovadia writes someone else should say with him as well
Q – Thank you Rabbi, can you describe how one should say kiddush with the reader? Can he whisper the words? Is he obligated to drink a reviit of wine as well?
A – You can whisper if you can’t be yotzei with him. You should drink if you aren’t yotzei with him