I've searched high and low ... so here is the thing:
I have several gmail accounts and yes I see all of them in Huawai's stock calendar app. So far so unnecessary.
However, the way that I manage my different appointments is by creating them under various sub-calendars in my main google account (firstname.lastname@example.org - work, email@example.com - play, etc.) When I am in the stock app I can't assign these subcalendars to new appointments and I can't make previous appointments show up.
Thanks so much.