The fundamentals need to be in place

Using Microsoft certified equipment is key because that is where audio video start and end. PC hard- and software need to be capable to provide Teams the required quality and performance. Old equipment and new software are not always a long lasting match

The corporate infrastructure can require updates and tuning to support audio and video. Wireless LAN requires specific equipment and configuration to support sensitive Real Time media.

Yes Teams runs in the cloud AND there are options to tune and match it to the corporate environment. This part is almost always overlooked but gains can be had here.

Having employees enjoy Teams media does require them to understand in what situation they can expect a certain quality.

MS Teams built-in monitoring and Call Quality Dashboard are a start, it does require Admins to have deeper understanding. There are better monitoring tools on the market that make it just easier to manage.

Usage of a platform changes with the business requirements. These changes shift the nuances to different ways of supporting and scaling what employees require. Regular reviews of the requirements give insight where change is due.