Hey, @wrp.16. Welcome to the Lightroom Community. I'll help you figure this out.
You can browse & edit images directly from the Gallery View in Lightroom. In the Gallery view, you can click on the Photos on device button to select the Downloads folder of your device to import CR3 images.
The interface you see in the screenshot is the default Android File browser that does not treat CR3 as a image file & also, only allows selecting one file at a time.