iphone 15pro max overheating problem

After an update, certain tasks continue in the background and might affect thermal performance.

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

For more information ⇢ If your iPhone or iPad gets too hot or too cold - Apple Support

Muhammad-Saeed213h wrote:

But will the overheating problem reduce in future updates

This is normal after an update. Your iPhone's certain tasks related to the update including indexing should only take a few days. Your battery life and thermal performance should return to normal soon. Have a great day.

Muhammad-Saeed213h wrote:

But this has also affected the batery life ,now I have to charge my phone multiple times during the day

That is entirely normal. After an update, your battery life and thermal performance may be affected by certain tasks related to the update continuing in the background.