Hi,
What is it exactly you want to achieve?
You can add a dial-in phone number for a Microsoft Teams meeting by following the steps mentioned in the link below:
Add a dial-in number for a meeting in Teams
https://support.microsoft.com/en-us/office/add-a-dial-in-number-for-a-meeting-in-teams-7c33e972-e5a2-4b32-aabd-09c0c5f18424
Best regards,
Leon