How do I add a "device action" for removable device?

English Hardware
1

Leap v42 & KDE (not Plasma 5)
Connecting my camera to a usb port offers only one action “Download photos with Gwenview”

In v13.1 I had several other selections, including ‘open with file manager’.

I tried to open the camera in Dolphin with camera:/ but it errors “invalid protocol”. The camera is PTP and worked in v13.1

udi = '/org/kde/solid/udev/sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.1'
  parent = '/org/kde/solid/udev'  (string)
  vendor = 'NIKON'  (string)
  product = 'NIKON DSC COOLPIX S4300-PTP'  (string)
  description = 'Camera'  (string)
  Block.major = 189  (0xbd)  (int)
  Block.minor = 6  (0x6)  (int)
  Block.device = '/dev/bus/usb/001/007'  (string)
  Camera.supportedProtocols = {'ptp'}  (string list)
  Camera.supportedDrivers = {'gphoto'}  (string list)

Why does Dolphin no longer work with camera:/ and can I fix that?

thanks, jon