This app was mentioned in 2 comments, with an average of 3.50 upvotes
That is an android app called FS Radio Panel (Pro). It allows multiple devices (from the same purchase) to connect to a small server installed on the pc. It has several pages of different instruments as well do you can mix and match different things you need at your fingertips. For 10$,i felt like it was quite worth it. The demo version is full of ads so it was a bit difficult to use or test, but the full version is great. I struggle to get the GPS legs to show up on that module. But the scrolling map, autopilot, buttons and other instruments work fine in P3D v4.
I use this one a lot: https://play.google.com/store/apps/details?id=com.tambucho.fsradiopanel