Does anyone know if a bitcoin LoRa wallet exists? I would like to use/build something like this that could be offline but still send transactions in locations without good internet coverage.
To my best knowledge there are no so far bitcoin wallets with interfaces which allow them to communicate directly via LoRa net, but you can acquire relevant adapter and connect literally any hardware wallet with USB port. Just a few examples of such adapters: RangePi, PineDio.
There are also LoRa NFC/RFID adapters (like this one), so using them you can connect HW capable to communicate via NFC protocol.
DYOR.