This is not new. I've seen video of her being introduce as 'Madam President' in several different far-Left venues.
It is a kind of 'elder abuse' in a way. They are taking advantage of her fragile mentality.
The same as if they introduced a guy who thinks he is Napoleon as "Emperor of France - Joe Biden".
It is hard to know if they are catering to her delusions, or if they are 'making fun' of her.
They all huddle in the back afterward laughing, "hahahaha And...and...and then I told her she was the 'real' President hahahaha".