It’s a matter of UX (User experience). For desktop, the users are used to have the menus on the top. After a while, the burger menu with a slide in menu left or right got also accepted in desktop, but it’s not really a common design.
For mobile, if you want to achieve an app-like design, a sticky tab bar with icons to the bottom with the major categories / functionlity of the page / app and a burger menu top left or right that slides in from left / right could be considered as the standard (and learned) behavior.
However, the downside on iOS: the Safari tab bar is visible until the user scrolls, which might confuse the user, and doesn’t look nice:
I haven’t seen a text menu to the bottom very often.