What is the meaning of who is this diva? in genz slang?

The meaing of the word who is this diva? in genz slang means the following:

• An affectionate rhetorical question used to compliment people who positively embody diva-like qualities such as boldness, style, and/or confidence.
• Commonly used in playful or admiring interactions.

Example

Who is this diva showing up in a custom gown?