For years now, Google Assistant has offered support for multiple calendars from multiple Google accounts. This feature has been a winner for me because I have three Google accounts (personal, work, and shared with my husband), each with its own calendars and events. I’ve been able to ask Google Assistant about my upcoming events, and it tells me about all the events on all of my calendars. I’ve also asked it to create events, and it added them, just like I set it up, to my shared family calendar.
However, when I switched to Gemini, this stopped working. No matter how many times I go in and give Assistant access to all three accounts and set up a specific calendar to create events in, it just won’t work. Unlike Assistant, Gemini stubbornly only has access to my primary calendar on my main account through the Workspace extension app. Nothing else.