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Using a USB-C phone with Power Delivery is ideal here, as it allows the phone to be powered while also communicating with the Arduino over USB. The RemoteXY app is built specifically for this purpose.
The Giga Display Shield (plug-in board) might fit the bill. It adds a 3.97inch 480 x 800 RGB touchscreen, digital microphone (MP34DT06JTR by ST), six-axis IMU (Bosch BMI270 inertial measurement unit), ...