Or you just poll. Or have a separate IO line between the two that is normally set as input wake on interrupt, when either party wants to signal it just makes it an output.
Which chips suffer that unpleasant gotcha??
Dang, sorry Stuart, absolutely, you have far more examples at all levels in your repro. I so rarely use LoRa directly it slipped my mind for that, but I do use your radio drivers when they are required. For others reference: GitHub - StuartsProjects/SX12XX-LoRa: Library for SX12XX LoRa devices