Anurudhsajeevan Hey mate, assuming you’ve had your device for a week or, less then, this is somewhat expected. It typically takes a device between 5 - 7 days of actual use to settle in, learn your usage and also apply all the relevant updates needed to give you an accurate battery performance.
On my (4a) I’m getting 9-10hrs of SoT consistently and that’s the same with my (4a) Pro… that didn’t happen overnight though.
In contrast my Pixel 10 Pro took maybe 2wks before it settled in to a good cadence.