Hello, @Steven Tay,
You can easily add or remove menu icons by navigating to Dashboard > Appearance > Menus > Main Menu > 8Theme Shop page Option > Menu option. There you will find an icon library where you can select XStore icons and set the icon name before saving the settings.
For reference, please refer to the following screenshots: https://ibb.co/zJq7HVL, https://ibb.co/c3tYsvY, and https://ibb.co/ysgKpjx.
If you would like to use XStore icons, please visit this page – https://xstore.8theme.com/xstore-icons/.
We hope this information is helpful.
Best Regards,
8Theme’s Team