I purchased I phone 11 before 2 month and now this is very high heat what should I do
i am using my phone just normal activity and after 2 month this is heat very I high
Overheating would trigger a shutdown with an overheat message.
iCloud photos and iCloud backup will use a lot of energy during the day if you do not charge overnight on WiFi as recommended.
Check the Settings, Battery graph to look for high usage apps.
If you are still worried you will need apples help
https://getsupport.apple.com/ and or at a store https://www.apple.com/retail/geniusbar/
