Presentation mode in full resolution on projector

I am trying to use Miro on my iPad connected to a projector for presentations. The problem is that the projected board has the resolution of the iPad and not the projector, so the slides show up too small on the projector. In contrast, the MS PowerPoint app correctly recognizes the resolution of the connected monitor or projector.

If the resolution doesn't adjust to the external monitor / projector on the iPad, then the presentation mode is useless on this platform.