No. Use mod_menu (or your template menu) for the top site navigation. Use Menu Scope for the documentation sidebar that accordion-expands the active product hub.
Different job. Megamenus target horizontal mega panels. Menu Scope targets vertical doc sidebars tied to your existing menu trail. You can run both if assignments differ.
For any doc tree with more than a handful of pages, yes. Without it you maintain hundreds of Menu Assignment checkboxes.
Yes, with different anchors or assignments — for example separate doc areas. Each instance has its own levels and anchor. Do not assign two doc sidebars to the same position on the same pages unless you intend overlapping nav.
Joomla 4, 5, and 6 with PHP 8.1+.
It respects menu items and associations like core menu rendering. Configure menutypes and anchors per language as you would for mod_menu.
plg_system_rca_menu_scope injected scope fields into mod_menu. The supported product is now mod_rca_menu_scope plus branch visibility. The old plugin remains on hold; do not enable both approaches.
Pro SKU via RCA pro extension feeds. Module and companion plugin update independently; keep both current for documentation sites.