In many places, including where I live, its illegal to record calls without the consent of all parties on the call. If they are being illegally saved (certainly possible), nothing in them would be admissible in court.

There is whole range of conversations that would never end up in court but if they are recorded can bring a lot of trouble.

Where I live, you only need consent of one person (ie: ypu self).

But then it changes when you are using company tools. Teams can be configured to automatically record all conversations. The consent is baked into your employment agreement.