@Sai Shashank Thanks for your patience on this. I have checked with Azure Communication Service engineering team and sharing the below.
currently this is an unsupported scenario. Events for a team's PSTN number is not available in ACS.
I would suggest you raise a feedback request using this link here. Our engineering team actively monitor and check the feasibility on implementing it accordingly.
Feel free to reach back to me if you have any further questions on this.