Yes—sometimes. A normal exported JPEG usually won’t let you refocus, because the phone has already combined the data into a single image. Refocusing works only if you still have the original Huawei P9 Aperture Mode file that contains the extra depth/refocus information.

If you kept that original file, community members pointed to desktop tools that can read the embedded data and let you change focus on a computer, such as the open-source "jpg-refocus-tool." Another answer also mentioned a command-line utility, "dual-camera-edof," for extracting the image data.

So the key is: if the transferred file is just a standard processed JPEG, probably not. If it’s the original file with Huawei’s embedded depth data intact, then yes, with the right third-party software.