My wife and I both applied for Ink Unlimited. She got approved after 3 days, and I received the following letter. "Thank you for your Visa Signature request. We need you to call us to confirm your information before we can continue our review. This may be related to an alert on your credit report, or to confirm your Taxpayer Identification." What should I expect when I call them?

A few data points. We're both under 5/24, and we each have the following Chase Biz cards: CIU, CICx2, SW Premier and Performance. We have been applying for a lot cards since Oct 2022 to get the SW Companion pass and the latest 34 days ago for the CIC. We use our SSN to apply. I pre-emptively lowered my credit line on two Chase Ink cards in case my overall credit limit could be a problem. We both have pretty good FICOs, but her score are always higher by 15-20pts, I think b/c of my student loans. Any advice in advance of the call to Chase would be appreciated.