What is one way King Charles and Prince Harry/Meghan Markle differ from traditional monarchies in England?

In a move that has left the British royal family reeling, King Charles has released a public notice saying Prince Harry and Meghan Markle are 'private citizens', not monarchs with official duties.

• Option 1: They're part of the royal family, but independent
• Option 2: We still do their royal work, despite their absence from duties