Hello, can you check if you have this issue too?
I am trying to edit a taxonomy in the admin (to manage the terms). And it does not appear under the CPT (CPT correctly set). The tax settings are:
'labels' => $labels,
'description' => '',
'public' => true,
'publicly_queryable' => true,
'hierarchical' => false,
'show_ui' => true,
'show_in_menu' => true,
'show_in_nav_menus' => true,
'show_in_rest' => true,
'show_tagcloud' => true,
'show_in_quick_edit' => true,
'show_admin_column' => true,
'query_var' => false,
'sort' => false,
'rest_base' => '',
'rewrite' => [
'with_front' => false,
'hierarchical' => false,
],