Iphone 15 pro max just bought less than a month ago gets hot during charging and i am using the charger that they rold me to buy from the Apple Store

Wondering which iOS version is installed on your iPhone:

About iOS 17 Updates - Apple Support says there have been 4 updates since iOS 17 was released:

Also says of the third update iOS 17.0.3 : This update provides important bug fixes, security updates, and

addresses an issue that may cause iPhone to run warmer than expected.

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This article: If your iPhone or iPad gets too hot or too cold - Apple Support

says:

"You might notice that your device feels warmer when you:

• Set up your device the first time
• Restore from a backup
• Wirelessly charge your device
• Use graphics-intensive or processor-intensive apps, games, or features, including augmented-reality apps
• Stream high-quality video

These conditions are normal, and your device will return to a regular temperature when the process is complete or when you finish your activity. If your device doesn't display a temperature warning, you can keep using your device."