These white-boarding tools allow multiple people to interact on a single board, and many of them support ideation templates and post-it notes.
MURAL is a digital workspace for visual collaboration
You can also use Zoom's white-boarding tool although it's not recommended because drawings are not permanent (they will be deleted if you don't save it!)
Use these tools to create screens or interfaces that you can use in your decks.
MockFlow - Wireframe Tools, Prototyping Tools, UI Mockups, UX Suite, Remote designing
Online Mockup, Wireframe & UI Prototyping Tool ยท Moqups
Balsamiq. Rapid, Effective and Fun Wireframing Software | Balsamiq
Your presentations will be done in the form of a recorded videos with 3 minutes live Q&A. To prepare for the recorded part, the following tools may help.
Video Conferencing, Web Conferencing, Webinars, Screen Sharing