@rangavinod Please raise one Adobe Ticket and for a temporary solution
(Its not as par Best practice as In general, the greyed-out area should
not be overlaid/extended), overlay formbuilder.jsp
(/libs/dam/cfm/models/editor/components/formbuilder/formbuilder.jsp) and
at line 110, change String CONF_ROOT to "/conf.*". Let me know if that
works, I tried that on AEM 6.5.10.0