Also clunkier things like LocalSend and even Syncthing. they require a step or two, but to me that step is worth the sovereignty.

For instance, with Syncthing, I literally have a "clipboard.txt" file synced p2p between all of my devices. I copy paste into that on one device and a moment later that "clipboard" is updated on all my devices. ...One hidden benefit is it has an arbitrary history. If i copy twice on an apple device, the previous copy is overwritten :P