Hello,
Thank you for posting in Microsoft Community forum.
It seems you are experiencing issue with connecting iPhone 15 pro to HP, but as a Microsoft forum, it mostly provide information with Microsoft products and services.
Since there are no engineers dedicated to iPhone or HP in this forum. in order to be able to get a quick and effective handling of your issue, I recommend that you repost your question to Apple/ HP.
Have a nice day!
Best regards,
Molly