As-Salaam-Alaikum everyone, just had a thought about investments and Islamic principles.

So I was looking into sovereign wealth funds and noticed that some from Muslim-majority nations have put money into interest-based banking, like the Kuwait Investment Authority did in the 2000s or the Public Investment Fund with Credit Suisse. It got me wondering: doesn't this involve riba, which is clearly haram? How do these institutions reconcile this with Islamic rulings, or maybe my understanding of the fiqh on this isn't right? Would love to hear your insights, insha'Allah.