I would like to create a messenger bot to making or starting a messenger chat group call (video or voice) automatically invoked on some kind of event but I don't see any relevant endpoints in Messenger platform. Is exists way to do that via facebook/messenger bot ? if not please tell me the possibilites to do that via another way
On the other way if it is not possible via messenger chat group maybe just default bot can make a call to several people ?
That's not supported. Docs for the Messenger Platform API can be found here btw: https://developers.facebook.com/docs/messenger-platform