Hi @Sapphire_Hitarth ,
Our forum is focused on general issue on Microsoft Teams troubleshooting. According to your description, your issue is more related to development, which we do not support. To get better response, we recommend you post your issue to it:
https://stackoverflow.com/questions/tagged/botframework%20microsoft-teams
I will provide some links about Teams video calling API document for your reference:
https://learn.microsoft.com/en-us/graph/api/resources/call?view=graph-rest-1.0
https://microsoftgraph.github.io/microsoft-graph-comms-samples/docs/
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