Various clients have recently started sending me emails containing invites to meetings that I need to "Accept" or Decline" via a link in the email. Mostly these are for Zoom meetings, but I think I remember getting them for other services as well. I know the idea is that these will turn into calendar entries if I click "Accept" or "Decline", but in my case that doesn't happen and the email simply disappears from my inbox along with the Zoom link.
I only use google calendar and I can sign into this using my btinternet email address, which I think is a backup address for my main gmail account. Is there another way that I'm supposed to link my btinternet email address and google calendar so that if someone sends me an invite to the btinternet address and I click "accept", the event is transferred to my google calendar?