Jiva chaitanyam is Brahma chaitanyam.
But Brahma chaitanyam is caught in body mind as though it's limited to body mind. Brahma chaitanyam never got limited to body mind.
Brahma chaitanyam has maya upadhi. With this upadhi it's isvara chaitanyam.

That's why jagat is mithya not satyam.

Iavaratvam is mithya.

Iavaratvam includes the ajnanam, this ajnanam makes same Brahma chaitanyam as jiva.