Press and hold the PS and Share buttons on your DualShock 4 until it enters pairing mode (shown by the flashing white light bar on the back of the controller). Open your Android phone's Settings app.
With the release of iPadOS 13.4, Apple brought official Bluetooth mouse and trackpad support to its iPads. This article explains how to connect your chosen input device from your iPad. To learn more ...
Google is experimenting with enabling support for Fast Pair for keyboards. Fast Pair is a feature that significantly simplifies pairing Bluetooth accessories to devices running Android or Chrome OS.