Options - Square off by broker - open positions

Hello. Hope you are well.

I have been selling covered calls on the shares I own. If the position is far OTM, I typically do not buy back the option I’ve sold, just before the expiry. However, SBI Securities (broker) auto squares off the open positions, on day T-1 and buys back the options I’ve sold.

I wanted to ask if square off policies are broker-specific. This is because, in the US market, OTM options on expiry just expire worthless (the broker doesn’t buy them back).

Thank you for your time.