Hello @Ania Livrieri 

this is not possible with the Powerpoint integration as the leaderboard automatically shows up after the last quiz question. The only option would be placing the last question at the end of your presentation or that you would manually switch between Slido and Powerpoint and come back to the latest question before showing the leaderboard. 

Here are some way how you can switch between Slido and Powerpoint:

If you’re using Mac, you can simply switch between your presentation and Slido Present mode by swiping with three fingers on your trackpad, either to the left or right.

If you’re using Windows, you can use the keyboard shortcut Alt+Tab to quickly switch between presentation and Slido.

Kindly