Yes, you will receive a new IBAN for the new Scalable account. You can find it in the app under Profile > Account details (Scalable Capital) > Products. On the website, it can be found under Profile > Products > Product Details.
Your Baader Bank IBAN remains. You can find it under Profile > Account details (Baader Bank) > Products. On the website, it can be found under Profile > Products > Product Details.