You're making assumptions about what they're doing that don't seem confirmed to me.
My guess is that you've asked for two different things, 'different date but virtual if circumstances.' Too complicated for them.
Just ask for a different date, after your scheduled return, in person or virtual - either one or the other (be specific) or 'either' i.e. tell them you don't care. (Virtual potentially a bit sooner because more of them / not location based, but only a guess).
If I've misunderstood what you've communicated to them, my mistake.