My iPhones won't Airdrop passwords to each other

My iPhones won't Airdrop PASSWORDS to each other, but it will pass contact cards!

I have an iPhone 6s and iPhone 11. Both have current 14.4 iOS update. I have done everything mentioned in other posts (Wi-Fi and Bluetooth are on, hotspot off, restart phone, Airdrop set to "everyone", etc.

Frustrating

[Re-Titled by Moderator]