The Airdrop freeze is intermittent which is why Safe Mode doesn't help much unless the Airdrop issue goes away after the first aid checking takes place, so I will give it a try.
The Airdrop freezes started after I first purchased my MacBook Pro in 2020 under OS Catalina, but after a few OS updates it seemed to go away. The behavior returned after the recent Big Sur upgrade.
I only Airdrop to my iPhone from the Macbook Pro.
When the freeze happens, my iPhone shows up in the Airdrop windows, but when I click on my device nothing happens and I'm not able to cancel or close the Airdrop window. I have to Relaunch Finder and start over, and then it will start working again for awhile...
I use the Macbook Pro for photo editing so I only transfer photos with Airdrop. Number of photos or photo size does not seem to be related to the freeze as far as I can tell.
I'll report back after a Safe Mode boot and see how long I go without another freeze.