Localsend looks neat, but they're absolutely pissing into the wind by saying that it is "Open-source Airdrop" in the title in the Play store.
That's a clearcut case of absolutely willful trademark infringement, and it will not go well for the authors when (not if) Apple happens to cast their gaze in that direction.
But localsend has worked well for me. Yes, it requires an app but if we could get vendors to bundle that rather than a boatload of bloatware.
I know that it would be to optimistic to hope for Google.
See https://localsend.org/
Spread the word.