audio channel only mono

Hello, I would like to ask one thing if it is possible. I am using a Mac with Catalina installed. I have seen that there is no full compatibility and I would like to know if the problem I encounter on the microphone can depend on that. I only have 1 channel and there is no way to change it. I have an old system iMac and I have two channels on that. I also tried to install the not yet final version 2.4.0 to see if it solved but nothing. Thanks