How do I get them to move to "Photos" and upload to the cloud.
How are your Photos Preferences set? Did you by any chance disable the option "Photos > Preferences > general > Importing. Copy items to the Photos Library"?
if you did that, you must not disconnect the camera until you consolidated the photos into your library.
Are you really talking about the "Imports" album in the sidebar of Photos in the Library section? Or rather about the "Importing" panel when you connect a device in the Devices section of the sidebar? It is suspicious, that the "Imports" vanished, when you disconnected the camera. Photos may still have been preparing the list of photos to review for importing and not been showing you the Import result in the Imports album. Then the import did not have yet have started.
I am using the card reader built into my iMac to save power in the camera when importing. It is less trouble than connecting the camera to a power supply for lengthy imports.