Is there a way to get control on the call audio of an android phone?

Hi All,

Good Morning. I am Prabhakaran from India. I am building an Android app using .Net MAUI. The app I am trying to build is an IVR type of application. I am able to route calls and all, but I am not able to get into the call audio of an incoming call. Means, I am able to attend an incoming call but the audio file or Text-to-Speech (Welcome Message) is playing on the media audio but not into the call how to do it? Possible? Thanks.

With Hope,
Prabhakaran