Ionic 4 ion-fab in all pages

i’m trying to place an ion-fab element on all app pages as a menu.
In app.component.html we have a main menu that appears on all pages. I thought of replacing this menu with my ion-fab element, but it doesn’t work. No one seems to use this solution in their app, but i found a lot of app in the store that use ion-fab. I don’t want to put my ion-fab manually in all pages, i’m looking for dynamic solution. Someone can help me please? Thank a lot.

May be you could create a component loaded at app launch and attached to the app.component.