Are you asking if iOS 17.0.3 address the heating issue some users were experiencing? Yes it specifically cites that is what it does. It is important to point out that users were NOT getting the overheated warning you are referring to nor has anyone legitimately shown their skin was burned so that’s a false narrative. People that had the issue reported their devices feeling hot and feeling uncomfortable to hold but none received the warning message that has existed for a long time when the actual internal temperature of the device would get too high alerting the user that functions would be unavailable until the device cooled back down.
Do you have an iPhone that actually has iOS 17 and experienced the issues (or have a device that you opted to wait to update to iOS 17) or are you just randomly asking?