Unable to remove a mystery bluetooth device 'PO26_F2C8' on my iPhone

• What happens when you try?
• Are you missing the info button next to the device?

Apps can configure and manage Bluetooth devices, so to identify it, go to Settings > Privacy & Security > Bluetooth, and turn off access to the apps to identify which one is using the Bluetooth connection. It will be removed from your Bluetooth settings when access is denied to the app.

Have you been using Car Play or connecting to your car handsfree via bluetooth? My car has an ident that has a format a bit similar to that.