I currently have this adapter as I use it for Sony Camera but it does not recognize the audio files even when using power to it. I believe it is the same sort of
The Lightning to SD Card Camera Reader supports standard photo formats, including JPEG and RAW, along with SD and HD video formats, including H.264 and MPEG-4. It supports data transfer at up to USB 3 speeds on the 12.9-inch and 10.5-inch iPad Pro, and up to USB 2 speeds on the 9.7-inch iPad Pro and all other iPad and iPhone models.
With this adapter, you can import an audio file only in the following way:
The trick is to rename the sound file by assigning it the name 8.3 with capital letters and numbers, moving it to the following structure (when the structure of the RAW files from the camera is completely simulated). See attached pic.
Then import this pseudo .CR2 (.NEF) file, share it by Files app to Documents6 folder, rename it to .WAV and share to LumaFusion finally.