Here is the current, and growing progressively in common, use-case ...

Over time, independent consultants acquire multiple Google accounts from companies that they work for (hosted on top of Google Domains).

Those people can currently POP the associated gMail email accounts into their single Zoho email account.

But they need to be able to layer the corresponding calendars on top of Zoho's Calendar, too (and make them visible or invisible as the need arises).

How can this be done? I have seen a couple of questions like this on the forums, so it sounds like a feature is needed if it is not possible at the moment.

Thank you!