The steps and the progress bar of your form might be greyed out and not available in the customiser because a single step form was selected while choosing a form template.
If your intention is to build a multi-step form, please follow these steps:
Return to the form builder
Add an extra step with questions
Save the form and go back to the customiser
The progress bar and the form steps will be available.
If you have any further questions about a multi-step form, steps of your form or a progress bar, please contact us by clicking on the blue support badge in the right corner at the bottom of the page.