AirDrop iPhone to MacBook

You will need to check the requirements it has to "see" your device:

https://support.apple.com/en-us/HT203106

I can AirDrop from my iMac to my iPhone running iOS 13 but so far, not from the iPhone to my iMac. But, the issue may be mine or something new with iOS 13.

In general, I find it to be unreliable; we have a total of 7 devices and, most of the time, have to resort to email or external drive because they simply refuse to see each other.

AirDrop is not something I would normally use. If they are in range I can see devices.