ConPeeg application.

Hello again!
This time, I have a question about the ConPeeg application. It’s a type of call center hub. This application isn’t something you can simply download online. It allows us to answer phone calls on a hotline. My question is, is this application accessible with the VoiceOver screen reader on macOS? Has anyone here had a chance to work with it? I apologize if this question is out of place on this forum, as I'm not sure if this application is used internationally. I’m asking here on behalf of my friend, who is very worried that the app may not be compatible with a screen reader. I wanted to help her by seeking your advice and expertise.
Best regards 😁