I do find that failure baffling -- especially since it used to work. I don't use voice commands much, but setting reminders while I'm doing something else used to be very helpful. Suddenly last August, it's just "not available for g suite users". (https://support.google.com/assistant/thread/11607814?hl=en)

I get it for free, but g suite is valuable enough to me that I'd pay for it. The thread implies that paying for it wouldn't help.