Possible to use SideCar with MacBook Pro w/ 4 external displays?

As noted in the tech specs of the MacBook Pro (16-inch, 2019), it can support to four external 4k monitors, and that's how I've set up mine. The maxed-out number of monitors + the laptop's display effectively give me five displays.

Can I use SideCar to add an additional display to this set-up?

MacBook Pro + SideCar + 4 external displays = 6 displays

Or would SideCar count as one of the 4 external displays?

MacBook Pro + SideCar + 3 external displays = 5 displays

I don't currently have a compatible iPad to test this with and I can't seem to find the answer anywhere else. I also posted this question on Apple's discussion forum but as specific display-related questions seem to get few responses there, I thought I'd try here as well.

Solution 1:

I haven't tested on the 16-inch MacBook Pro 2019, but it seems to me on my hardware that the SideCar does not count as an external display in this sense. So you should be able to get a total of 6 displays that way!