I point you to the Constitution and the 25th Amendment.
VPOTUS does not have C-in-C until such time s/he is sworn in as POTUS.
Again, Al Haig was NOT wrong when Reagan lost consciousness.
The Joint Chiefs are C-in-C until POTUS recovers or VPOTUS is sworn in.
That is an “originalist” interpretation of the Constitution and 25th.
Thank you for the clarification, CDY. I didn’t know that or forgot it. It’s been awhile since my Constitution 101 course.