search bar in spine theme

there’s no straightforward way to do this right now.
you mean you want it to be part of the nav menu?

How can i make search bar part of menu section. i want to keep search bar in menu section. how can i do it !!

If you’re comfortable with code, you could try this example
https://www.wpbeginner.com/wp-themes/how-to-add-custom-items-to-specific-wordpress-menus/

however, as the menus use the Foundation markup, it may not work as expected.

I might add this in a future version as an option