Adding off-canvas toggle in a site header created with Elements

Hi,

I have set up a menu for the off-canvas panel, enabled it in Customizer and I have added an empty primary menu to activate the toggle.

All works ok, except that now I need to create some custom site header layouts for specific pages and I need to add the off-canvas toggle.

I created a Block Element and assigned it to Site header and then I added the core navigation block (selecting the empty primary menu) but it will not show the toggle in this case.

Is there any way I could show the toggle manually in such cases? A shortcode maybe?

Thanks