is there an iphone 15 Pro user manual
looking for a user manual on the iphone 15 Pro that is free as a download.
iPhone 15 Pro
iPhone User Guide - Apple Support is the manual for all models that use iOS 18. Where there are differences between hardware models those are described in the text.
Here is the complete Apple documentation manual link→Manuals, Specs, and Downloads - Apple Support, which includes manuals for earlier iOS (and other device) versions.