However, you could say something like:
בוקר טוב מלכים ומלכות (Boker tov malachim u-malchot)
This translates literally to "Good morning kings and queens." While grammatically correct, it might sound a bit unusual or overly dramatic in everyday conversation.
A more natural and less formal, but still respectful, option would be:
בוקר טוב לכולם (Boker tov le-kulam)
This means "Good morning everyone" and is perfectly acceptable in most situations.
The best choice depends on the context. If you're addressing a group of people in a playful or theatrical way, the first option might work. For a more natural and everyday greeting, the second option is preferred.