Sections - Sections as expansion panels
The "rootDisplay" option is not supported in vjsf v3.
Use the x-display="expansion-panels" annotation to display sections as panels. You can also use the rootDisplay option to display root sections as panels regardless of the content of the schema.
You can use the x-propsannotation to configure the rendering of a specific set of expansion panels and the expansionPanelsProps option to configure default rendering of any set of tabs.