WPML flags in subheader

Hello,

I would like to use the new WPML custom language switcher to put the flags inside subheader (near the social icons) instead of main menu, to have flags always visible in mobile view.

Where should I put the do_action('wpml_add_language_selector');?

I tried many places but the flags always goes on a new line instead of on the right where I would like them to stay.

Thank you