AWW – A Web Whiteboard is a website that offers a touch-friendly drawing and annotation tool. Their free service includes a basic whiteboard, board sharing, and basic chat. You have the ability to download your board as a .pdf at the conclusion of your usage of theier tool.
They do have paid packages, but their free service may be a powerful tool during this covid quarantine.
As there is no need to sign in to use the service, privacy is not a concern as they are collecting no data in that regard.