Charge draning super fast

Post a screenshot of your Battery Usage for the last 24 hours by apps. This will identify what app(s) are consuming your battery. You can then test the performance again without the troublesome apps to see if the issue is resolved. The latest updates to many of the Meta apps have been seen to consume far too much of your battery. The background processes in those apps continue to drain the battery even when the apps are not being used.

Please review the following article:

If the battery in your iPhone drains too quickly - Apple Support

Also, if by chance this is a new iPhone, then these conditions are entirely normal as after setup, certain related tasks including indexing may continue in the background, in which you may experience an increased battery drain. When the setup is fully complete, your iPhone will return to normal conditions.