we have no native Sensor which is able to monitor MS Teams. However, we have Common SaaS Sensor which monitors services like Office 365.
If this does not fit your needs, please use the EXE/Script Advanced Sensor with a script.
Disclaimer: The information in the Paessler Knowledge Base comes without warranty of any kind. Use at your own risk. Before applying any instructions please exercise proper system administrator housekeeping. You must make sure that a proper backup of all your data is available.