There is a new application available for Sparkers: Teams for Linux
What is Teams for Linux?
Unofficial Microsoft Teams client for Linux using Electron. It uses the Web App and wraps it as a standalone application using Electron. The official client for Linux from Microsoft is retired by the end of 2022 and is replaced with PWA.
Installation (Sparky 7 & 8 amd64/arm64/armhf):
sudo apt update
sudo apt install teams-for-linux
License: GNU GPLv3