is it possible to add the complete megamenu module at bottom bar, just behind the logo in mobile version, instead of the three lines?
Also, could it be possible to add it sticky at the bottom of the screen?
Sure! It will be something like the image attached.
It will only appear a first level of navigation.
Maybe, if there is no enough horitzontal space for complete megamenu, could add a horizontal scroll.
Unfortunate, it’s not possible. Also it’s not recommended, because Android and Ios handle click events in two different ways, so customers would have problems of openning sub menus if the menu shows like that.