Downloading Accessory Firmware. Your Accessory Will Not Function Until The Download Completes ((new)) -

Peripheral devices—such as the —rely on internal microcode (firmware) to communicate with iOS or iPadOS.

Ensure you are on a stable, high-speed Wi-Fi network. Avoid cellular hotspots. terminates stuck background daemons

A forced restart flushes the system cache, terminates stuck background daemons, and re-initializes the accessory handshake protocols. and re-initializes the accessory handshake protocols.