https://wccftech.com/meeter-is-a-free-mac-app-that-lets-you-join-zoom-teams-hangout-meetings/

Meeter is a free Mac app that lets users easily join Zoom, Microsoft Teams or Google Meet scheduled meetings right from the macOS menu bar.

In this day and age when all work and communication revolve around online conference calling services, Meeter aims to make it easy to join scheduled calls by fetching information from the macOS Calendar app. The app also supports a quick call list and speed dial so you can easily dial up contacts that are not in your contacts list, using any of the services that you have.