Hey, @adriant12105070. Welcome to the Lightroom Classic community. I'll help you figure this out.
How do you import the images from the iPhone to Lightroom Classic? Do you use Apple Photos to import the images to Lightroom Classic?
Images imported from Lightroom mobile (iOS/Android) & Lightroom Desktop sync as full-size raw files to the cloud at Lightroom Web (https://adobe.ly/3RYYXR6). By design, Lightroom Classic works with images stored locally, so Lightroom's logic requires the full-size images to be downloaded at the default location.
Awaiting to hear from you. Thanks!
Sameer K
(Type '@' and type my name to mention me when you reply)