How do you turn AIR DROP RECEIVING to ON?

Choose the "Contacts Only" or "Everyone" option in AirDrop in the Control Center. See the following from Share content with AirDrop on your iPhone, iPad, or iPod touch - Apple Support

Use Control Center to choose who can see your device in AirDrop and send you content.

1. Swipe up from the bottom of your screen to open Control Center.
2. Tap AirDrop.
3. Choose one of these options:
• Receiving Off: You won't receive AirDrop requests.
• Contacts Only: Only your contacts can see your device.
• Everyone: All nearby iOS devices using AirDrop can see your device.

No amount of tapping works. Bluetooth and wifi are on. AirPlay mirroring works. Is there any other options?