On the LR menu bar go to:
Lightroom >> Preferences >> General (tab)
Ensure the box is checked:
Show import dialog when a memory card is detected.
But you will also need to launch photos and switch-off the default for each iPhone or device.
Thank you very much for the help. I’m new to Lightroom but I can see I’m going to love it once I get going.
I think you need to check the Image Capture preferences or Photos preferences.
Thank you very much for your advice. I’ll check it out and see what happens.