Can penny stocks be traded on a major exchange?

Could you please clarify for me if penny stocks are indeed tradable on a major exchange platform? I've heard differing opinions on the matter and I'm curious to know if there's a definitive answer. Are there any specific regulations or requirements that penny stocks must meet in order to be listed on a major exchange? And are there any notable examples of penny stocks that are currently traded on major exchanges? I'm eager to gain a better understanding of this topic and your insights would be greatly appreciated.