Previously, Airdrop's permanent feature, which was "Public", allowed you to receive friends from people close to you, even if they were not in your contacts. Changing this feature, Apple has decided to change the live for everyone feature as of the iOS 16.2 update. With the new update, you will be able to use AirDrop publicly for only 10 minutes.
Many iPhone owners reject all content from AirDrop because they avoid receiving dangerous content. You can choose Airdrop as "Off" or "People Only" to reject dangerous content.