mhhhh i guess here is the problem. I don't think I can give the rewards on the overlay add-on any command names. They only have a title, a description and the required point amount as editable option.
That's what I meant. I can't think of any other option but two two systems aren't compatible with eachother. The only option would be to use LioranBoard and setup the overlays yourself. LioranBoard is compatible with VTuber Plus.