On the Angular Material stepper there is a stepControl property on each mat-step that contains a form. What does the stepControl property do?
<mat-step [stepControl]="registrationForm">
It seems like the function would be to disallow moving to the next step if the form is not valid, but just wanted to double check.
Correct, however, if any form validation is not compulsory you can use the isOptional property to ignore that form's validity and proceed to the next step.
<mat-step [stepControl]="registrationForm" [optional]="isOptional">
Similarly if you are not using Reactive Forms you can use another property called completed to allow the user to proceed to the next step only if completed is true
<mat-step [completed]="isCompleted">