I'm in the same boat, as my organization's events are now almost entirely virtual. I chatted with customer support about this today with no new insights.
Currently, as a workaround, I think I'm going to switch to setting up my events as blog posts. I'll set the event date as the publish date but still publish the "blog post" well in advance of the event. (For instance, I can publish an event's "blog post" today with the supposed publication date of Sept. 20, so Sept. 20 will appear as the date below the event/"blog post" title. Then I'll just manually create Google Calendar links and add those, and type in the time, timezone, and the fact that it's virtual near the top of the "blog post." It's not a great solution, but it's the best workaround I've come up with. Since blogs, like events, are collections, this will still allow me to have "blog post" events feed into summary blocks elsewhere on my site.