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@manpreet02 are you on a smart meter, or old analogue meter ?
If a smart meter then they are usually very accurate, but even they sometimes give an estimated reading for sometimes 3 or 4 days after a particular date.
I once had smart meter data missing for 3 months of usage, and that took 7 weeks or so to get it restored !!
If if is a smart meter estimate, you'll see that in the app when viewed right down to 30 minute intervals, the graph bar is hollow and Estimated comes up near the usage $ / kwh up top.
If an old analogue meter you are probably seeing estimated bill to date based on normal usage, and even then estimates are on the high side of normal generally.