Over Heating while charging in 15pro max, but apple customer support said it is because of camera section fault

I bought an iPhone 15 pro-Max almost 6 months ago it was a brand-new device. I bought it from a 3rd party reseller,

But now I'm having some issues, I notice it's overheating while charging not while using, also the battery health dropped to 98% with only 130 charging cycles

of course, the battery is Draining so fast that it is not last more than 1 day, so I contacted Apple support Online and after they ran diagnostics on my phone they found that there was an issue in my camera section that was probably creating such an issue so they advised me to visit an Apple premium reseller store near me as I don't have any Apple store near

so my question is as I have the warranty will they give me a brand new device or will they repair my device?