Music added on my iPhone 15 pro are not shown on iTunes

Apple's iTunes software is, in the main, designed to transfer data from the PC to their devices but not in the other direction. What happens when you select "View My Account" (from the above)?

You may want to see:

If your Apple ID is locked or disabled - Apple Support

You're getting that message because the phone has been synchronised with a different iTunes Library.

Since Apple's devices can only be synchronised with one library at a time, when you synchronise with a different one iTunes will remove everything that had been added from the previous iTunes and add only what is in the current library. Hence the message that you see.

So the question is; is the current library (the one shown in the screenshot) on the same computer, but the computer has been re-built or repaired, or is it a different computer?

• • if it's the same computer, that has been re-built or repaired, then as long as the library contains everything that was in it previously, you can tap the Remove and Sync button. iTunes will then remove all the media and put back the same media, but from the re-built library
  • if it's a different computer, it needs to have all your music etc. in it before you try to synchronise the phone with it. One method is to copy the media (music, videos etc.) from the old computer to the new one and then add it to the new iTunes library. Note that the media on the phone will not be copied back to iTunes

If you no longer have access to your old library, let us know and we can discuss how to proceed from there.

The Sync Library option is found buy clicking on the device icon at the top of the iTunes window, not the sidebar. See the screenshot:

By the way, it is wiser not include personal information in your posts or your screenshots.