You need to configure Default options to use BuddyPress.
You can disable / able buddypress options.
Cover Header Setup
If you want to use cover header like our demo, please set like this.
Please make sure to enable "Group" if you want to use group header.
You can add some fields for your user profile.
You can set menu order. ( Appearance >> Customize >> BuddyPress Nouveau )
It's built by BuddyPress and we don't use WordPress menu.
Remove BuddyPress Home Menu : if it's enabled, please uncheck this menu. We have our own HOME, so you don't need to have 2 Home pages.
You can make an order of menus.
BuddyPress Pages with Elementor
As you might know, BuddyPress pages are not possible to use Elementor to customize layouts.
BuddyPress doesn't basically provide "The-content" which needs for Elementor page builder.
BuddyPress pages are mostly fixed template by code.