If your nav bar is a Symbol (i.e. it turns green on hover), you first need to double click to edit it.
Then, look for the Search element in the left menu. The menu button looks like this:

And the Search element looks like this:

Drag the search element from the left menu onto the nav bar where you want it positioned. I encourage you place it inside the Container element alongside the logo, assuming that’s how your nav bar is set up.
You will then need to edit the styling and margins/padding from the right menu of both the search button and the bar itself.
Also, a good forum habit for support is to provide a read-only link, which can be created here:
