A. Check if NFC is enabled on your device. Go to 'Settings' > 'Connected devices' > 'Connection preferences' > 'NFC' and ensure it is turned on. If it is already on, try toggling it off and back on again.
B. Make sure that the Smart Wallet app has the necessary permissions to use NFC. Go to 'Settings' > 'Apps' > 'Smart Wallet' > 'Permissions' and ensure that NFC permissions are granted.