progress: 'step' (default)

Numbered circles connected by a line - the classic wizard look.

progress: 'bar'

A single filled progress bar with a step marker, no per-step labels.

progress: 'pill'

Rounded pill markers - the only style where a visited step is clickable to jump back.

progress: 'none'

No progress indicator at all - just the step content and the Next/Back/Done footer.