I have not got this feature as shown in the demo theme while importing the demo?

Hello @sumit, You can find these settings in Customizer -> Mobile panel and set your links, icons. See http://prntscr.com/uh3bn0. This area is not for the bug reports or issues, did not you see the messages prntscr.com/sye402 ? If you have problem, submit topic on the support forum www.8theme.com/forums/xstore-wordpress-support-forum/ using Submit topic button in the right sidebar! Regards