Mix function in Powerpoint

I have Office 365 Home and shared it with another person. For some reason, the Mix function in the top bar doesn't show for her. It is also not visible in the File ->Options->Customise Ribbon. Does anyone know what this issue could be? I cannot be sure that Mix feature is available in Office 365 Home because I also use my college account (and it is possible that while toggling between accounts I somehow got it?)