I suggest trying to apply for a credit card (CC) through the portal but do not complete the application. Customer care will call you to register you as an interested customer. This should trigger a pre-approved offer for a credit card.
I have held my salary account with SC for almost 2 years but have never been offered any credit card deals through the app. Once, I tried to apply for a platinum card with some TWS offer, but the application failed midway. The next day, I received a call from customer care offering the platinum card. I applied but was rejected for an unknown reason.
After a few weeks, I started seeing pre-approved card offers for me in credit cards. Last month, I was pre-approved for all their cards. I was skeptical of SC and applied for the smart card. It got approved with a limit of 500k. I should have gone for the Ultimate, but now the offer is no longer available.