It’s still a setting, like rerouting mode, not a user action.
Can you explain, why need to play navigation simulation on the road just before driving?
There is no need to change it frequently, when be inside where simulation has meaning.
What is that “Navigation” or mean the button?
If mean the menu, it’s already overloaded and will simplify it,
so can offer in the future an enhanced UI with large buttons.
Navigation button could be enriched with long press menu,
if we see that pause / start navigation is useful for majority.