Keep them close (or use discovery mode)
Didn't fix it
- If your Bluetooth accessory was previously connected to the iOS or iPadOS device you wish to use it with, make sure that the accessory and device are close to each other. If you haven't paired them before, you might need to place them in discovery mode first. Check your accessory's instructions.
Apple: If a Bluetooth accessory won't connect to your iPhone or iPad ↗