How much time does it take for money to be credited to bank account, after TBills have expired?

Hi, I wanted to ask how much time it takes for money to actually hit the bank account, after the Tbill which I am holding expires.
I did some digging around, at least on the internet it is showing it gets credited within 15 working days, but I am interested if it gets sooner than that if anyone has had a practical experience?

16.1 The settlement cycle for auctions of all kind of G-Secs i.e. dated securities, T-Bills, CMBs or SDLs, is T+1, i.e. funds and securities are settled on next working day from the conclusion of the trade.

https://www.rbi.org.in/Scripts/FAQView.aspx?Id=79#16

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