Hello, @SC,
1-Your issue has been solved please check back to your site after clearing the browser cache, actually, you did not set the image use like “image” from that particular menu item, I have chosen it as shown in this screenshot, and it worked: https://postimg.cc/rKx7Psgx
Resulting: https://postimg.cc/BPWMT5ry
2- I made a detailed video for you kindly watch it complete to know how to set or modify the sub-menu: https://streamable.com/yeyl88
3- Your issue is resolved now, kindly check back to your site after clearing the browser cache. See the image to know how I fix it and the result now: https://postimg.cc/K4bWgJb0
4- Your issue is resolved now, kindly check back to your site after clearing the browser cache. See the image to know how I fix it and the result now: https://postimg.cc/Jt9GqDTY
5- Issue resolved now the changes will appear to see the image: https://postimg.cc/PpVKczLw
6- Please watch this video I changed the background of the category you want https://streamable.com/2rware you can only change the styling of the page using this method.
Regards 8Themes Team.