Hi Menaka,
When I select the “Horizontal menu” type, it shows okay on the PC, but on mobile it changes to the hamburger menu, which is good. Only problem is that: The hamburger button overlaps with the menu items, which makes it unable to press it to close the menu. I think this is a bug as I disabled all the plugins and the problem still exist.
here is a screenshot of the menu when opened on mobile:
1. Menu closed:

2. Menu Open (See X button is overlap by menu item, and menu cant be closed):
