how to import photos from iphone to lightroom on macbook (silicon) with icloud photos on?

When iCloud Photos is enabled, there are two relevant options. The first, which is on by default, is "Optimize iPhone Storage"....with that setting enabled "all your full-resolution photos and videos are stored in iCloud in their original formats, with storage-saving versions kept on your iPhone as space is needed" (from the iPhone User Guide).

However, the option below that allows you to "Download and Keep Originals", which I guess you'll need to use in order to facilitate importing from the iPhone into LrC.

The problem with iCloud Photos is that there is a setting that will offload the photos from the device, and only keep them in the cloud. On the device you'll only have a link to the photos, like an alias on the Mac. This is great to save space on the phone, but when you connect such a phone to Lightroom Classic, then Lightroom will see it as a camera allright, but it won't see any photos because there are no photos. So if you want to download your photos into Lightroom Classic, then you must make sure they are really on the phone, not just in iCloud. I don't use iCloud Photos myself, so I can't tell you how to do this without turning off iCloud Photos completely (if that is possible at all).

When I connect my iPhone 14 Pro, it shows up as a Device in the Import window.