to get this working along with the full width component, you’d need to add some CSS to your theme…
Something like this should get you in better shape:
html:not(.has-full-page-chat) .custom-categories-navbar {
grid-column-start: 1;
grid-column-end: -1;
}
.has-sidebar-page .d-header > .wrap .contents {
gap: 0 1em;
}