Hello @Amir Sohail ,
You can make use of Call Graph API. Create call API enables your bot to create a new outgoing peer-to-peer or group call or join an existing meeting. You will need to register the calling bot and go through the list of permissions needed as mentioned here.
Learn more on how to register the calling bot: https://learn.microsoft.com/en-us/microsoftteams/platform/concepts/calls-and-meetings/registering-calling-bot
Hope this helps.
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