@scrambler – I think you got the mobile menu threshold backwards.
The option lets you change the mobile menu threshold to be LESS THAN 768. Anything wider than 767 ( >= 768 ) must always be the standard menu. This includes iPads and other tablets wider that 767. The value of this option is to display the regular menu bar for menus without many items on mobile devices.
Thus, and I see no available solution for this in the future with standard Weaver Menus, Weaver Xtreme is hardwired so that the menu bar will always be the full menu bar for iPads.