Just a little update.
We do have Nexmon running on a Banana Pi M2 Zero and injecting, the issues we have are when swapping the original module out. But we shall get there.
We do also have Pwnagotchi running on many more boards with external wifi (opi zero lts, opi zero 2, nano pi neo, nano pi duo2, banana pi m2 zero). If anyone wants early test images feel free to message me or leave a note here.