Hello,
1) I see that you enabled XStore AMP plugin https://xstore.helpscoutdocs.com/article/111-general-info-amp
It means that you use not the responsive layout of the default XStore page but AMP plugin page https://prnt.sc/26f4n9i So, do you prefer to use the AMP version or do you plan to turn it off and use the default mobile layout?
2) Go to Static Blocks > edit Footer static block using WPBakery page builder and change the content according to your needs https://prnt.sc/26f4o3d
3) You use background image for the slide background and displaying of that depends on your settings https://prnt.sc/26f4qfq There is no option for the mobile device only to change position for the bg image. But you can add image layer to manage that position and display that for the iPad and mobile only https://prnt.sc/26f4tev
Regards