KDE Connect - available for Linux, Android, iPhone, iPad, Windows
A ported version is available for Mac.
It supports to transfer files, clipboard, able to access/send SMS, use it as remote keyboard/mouse, pass terminal commands from mobile to pc and many more without Google.
The peer devices should be on same Wi-Fi, that's the requirement.
I don't know what the experience is like for other people but KDE connect sucked to use on windows for me. It was a coin toss whether or not it would detect my devices. Nearby Share has been flawless so far.
This doesn't fix my issue. Like I said, the devices do see each other, it's just that it only happens sometimes. I can't be bothered with tinkering with my router just to have software working when there are easier alternatives that work out of the box.