Airdrop functionality relies on the proper functioning of both Wi-Fi and Bluetooth. If either of these features is not operational, Airdrop will not function as intended.
To share your iPhone's internet connection with other devices, you can use the Hotspot feature via Wi-Fi, USB, or Bluetooth. This feature is available only if your carrier has enabled Hotspot support for your SIM. Without an active SIM or if the SIM is removed, you won't be able to share your iPhone's internet connection with other devices.