HUB Elementor - How to Assign a Different Header to a Specific Page
Page Options are similar to Theme Options, the main difference is theme options are global options where affects the entire website, page options enables you to override the theme options and offers some other unique functionalities to a specific page.
First of all, create a new header which will the specific page then customize the created header with Elementor.
Go to Page Settings > Page Header Options > Header Template
Assign the page the specific header other, new header will show the assigned header on the page by overriding the theme options.