My two cents
Some specialised tools like presentations built with Canva or Miro can easily switch from a presentation mode to a whiteboard mode.
Classical tools like Google Slides, Keynote or Powerpoint don't allow you to embed a whiteboard (directly from Miro, for example). But instead, you can make a screenshot of your zoomed-out whiteboard, add it to your presentation and add a link to the image. So when you arrive at that slide:
You can easily click on the whiteboard screenshot to access the whiteboard
And if the details have changed in the whiteboard, it's not an issue as your screenshot shows the overview, and each sticky note isn't readable as it's too zoomed out.