In custom model driven app created on Dynamics 365 9.1 on-premises, several entities configured for global search were not visible. For an example, in global search I setup Notes entity, but it is not visible under new app which runs under new UI.
Global search entities are configured under Administration -> System Settings -> section Set up Quick Find.
Current setup looks like:
On image below it is displayed all entities available in Global search filter in legacy Dyn365 app and new custom model driven app.
Even if Notes are used on some existing entities in model driven app like Quotes and Invoices it is not presented in search filter list. Problem here was that Note entity is not included in app components.
After Note entity is included in app components, it is also visible under global search filter:
Lazine CRM čarolije 