Option B — PowerPoint Add-in (present from PowerPoint)
In the Designer’s top bar, click PowerPoint Add-in.
A one-time pairing code is shown (it is single-use and expires).
Open the Facilitator Tools add-in in PowerPoint and enter the pairing code to connect it to this session.
Run your deck from PowerPoint with live activities connected.

PowerPoint Add-in dialog showing the pairing code
Facilitator Tools