Zoom has facilities to share an iPad or other tablet screen. This is how all the college instructors I know have been replacing our whiteboards for virtual lectures. If a candidate doesn’t own a tablet, I suppose you can fall back on hackier solutions, but I suspect it could be worth the company buying a couple of tablets and actually shipping them to candidates who need them, at least in later stages, if you really want the whiteboard experience.

Interestingly, this is about the first time I’ve ever heard anybody say anything nice about whiteboarding. Plenty of programmers mainly think in actual code, and feel disabled by the lack of access to syntax highlighting, documentation, and such, let alone the Internet, in a whiteboard interview. Such coders may not be disadvantaged by virtual interviews.