Hello aakrati1512,
We're glad you thought to ask Apple Support Communities about your battery life after updating to software version 14.6. After updating, did you also update your apps? This can help with battery life and other concerns too. Just in case, here's a guide to help: How to manually update apps on your Apple device
After ensuring your apps are updated, check the battery usage to see what's using the battery. The following guide has great information about the battery usage, and some steps to take if anything unexpected is found: About the battery usage on your iPhone, iPad, and iPod touch
We also recommend taking a look at the information in the following guide on battery life and performance. Under the section titled "How to maximize battery performance" is an additional link to some tips to help improve battery life: iPhone Battery and Performance
Let us know how it goes.
Take care.