Nav Link Not Showing In Site Header On Tablet/Mobile, Tablet/Mobile Sticky

Well, if that’s the case, we can try hook after_header_content instead for your block Element. You may remove this CSS as well:

nav#mobile-header > .inside-navigation > .menu-bar-items .my-cat-menu .wp-block-navigation__container {
    display: block;
}

Then, to remove the primary nav, you may create a Layout Element displayed to your preferred pages, and disable the Primary nav from there.

We'll need to position the Block Element through CSS.

This did not work so I went back to our last settings:

I changed the hook to after_header_content
Created a Layout Element
Disabled the primary menu
Set the sidebar to content (no sidebars)
Chose the display rules

Removed the CSS:

nav#mobile-header > .inside-navigation > .menu-bar-items .my-cat-menu .wp-block-navigation__container {
    display: block;
}

I see. I noticed you created a new topic with regards to this. Let's continue there.