Most people don't seem to have problems with the battery life: https://www.reddit.com/r/iPhone14Pro/comments/121qr80/battery_life_on_the_14_pro/ If there was a widespread battery problem with the 14 Pro, you'd be seeing a lot more complaints on posts like that.

That said, there can sometimes be general battery issues:

• Social media and music apps can be battery-sucking vampires. If you see poor battery life, check to see which apps are eating your battery (you should have had your iPhone at least a day before checking).

• Indexing. Not only does your iPhone try to find individuals in your photos, but they're also sorted into categories like animals, food, vehicles, art, music, and others. Your email and text messages are also indexed. Depending upon how much stuff you have, this can take anywhere from moments to a couple days or more, and this indexing will eat your battery while it's ongoing. Your iPhone will be a bit warm while this happens but it shouldn't get hot. Your battery life should return to normal after this.

  This indexing happens at each major iOS upgrade (e.g., 15->16), but it can also sometimes happens during an intermediate X.Y upgrade. (It basically happens whenever Apple thinks it needs to happen.)

• Bugs. Bugs happen. For example when I upgraded from 16.2 to 16.3 (or one of the earlier point releases -- I forget which), my iPhone got hot pretty quickly after the upgrade, even though I wasn't doing anything with it (iPhones can normally get hot when playing games, for example). I did a soft reboot, and everything's been fine since.