LocalSend is not exactly an alternative to AirDrop. In LocalSend, two devices must be connected to the same LAN to share files with each other. In AirDrop, no LAN connection is necessary. Files are transferred directly between devices, similar to Bluetooth file sharing between devices.
KDE connect on iOS doesn't yet have the file transfer feature completed. I was surprised by that when I was looking for a good way to airdrop from my desktop Linux to my work iPad.
Works well, but struggeled when I tried sending 100+ files or a 80gb files folder.
Don't know if my phone was the limitation factor, but the app crashed.
But a very cool software to easily and fast share some files!