Phased functional Teams deployment or full deployment?

Sankarasubramanian Parameswaran at a government level tenant I do not have administrator deployment experience with Teams to answer your question; I suggest you ask this question of the contributors to this article: https://docs.microsoft.com/en-us/microsoftteams/msi-deployment

On a personal level I installed the free Teams app on my PC using click to run and it was relatively quick to install. You may also want to consider that every Teams notification that opens on the user's browser offers a button for the user to self-install the software. If your environment allows users to do this, users may choose to install the app themselves, or just use the online version of Teams.