Best possible way to display 6 tabs with first 3 as mandatory steps and rest activated after completion of first 3?

We are revamping the attached page.We are using Angular Material framework.Requirement are as follows : 1. User needs to fill form in first three tab as mandate like a wizard or stepper. (Expected Details,Arrived Details & Berthing Details) 2. After Berthing details are filled, the rest of the three tabs are activated and user can choose to fill any of the remaining form. 3. Once any form is filled and saved in tabs, user can go back to it at any time for editing.