I would like to be able to use TeamsPhone in a customized model-driven app so that call details (such as call logs and conversation content) can be saved.

In Dynamics 365 (Sales Hub), when Teams calls, real-time transcription, and call analytics summary are enabled and the recording policy is configured, activity records are automatically created, and transcripts and audio data can be viewed from the call analytics summary tab.

However, these features are not available in original model-driven apps.

If these features become available in original model-driven apps, it would enhance the usability and convenience for a large number of users.