Are you able to share screenshots of what you’re seeing? When I launch the player, this is what I’m getting:
If your Handy is in bluetooth mode it should connect and update the status from scanning to connected.
You’re not launching intiface from your side, are you? If so you’d need to set EmbeddedButtplugServer to false in the appsettings.json file. And make sure the buttplugurl points to your intiface’s address.