I haven't downloaded Maya 2020 yet, but in the last few versions Prism worked without any additional changes in the new Maya version. So I would guess the current Prism version works already with Maya 2020. You don't see Maya 2020 in the Prism installer at the moment, but you can add the Prism integration in the Prism Settings dialog in the DCC apps tab to the Maya 2020 preferences folder.
Would be nice to hear from you if that works, but I will test it soon too.
I haven't downloaded Maya 2020 yet, but in the last few versions Prism worked without any additional changes in the new Maya version. So I would guess the current Prism version works already with Maya 2020. You don't see Maya 2020 in the Prism installer at the moment, but you can add the Prism integration in the Prism Settings dialog in the DCC apps tab to the Maya 2020 preferences folder.
Would be nice to hear from you if that works, but I will test it soon too.