Editing the Header Theme options from Front > Header does not reflect in the Header of the website.
The most common reason why Header Theme options are not reflected in your website’s page is that it may have a Custom Header. You can find out if a page has a Custom Header assigned or not from Front Editor Options available at the top right corner of your Gutenberg Editor.
If your page has a Custom Header assigned, then to customize the Header, you’ll have to navigate to the Static Content that acts as a Custom Header and edit the Front Header Gutenberg Blog to customize. We’ve documented all the options available for Front Header Gutenberg Block here : https://docs.madrasthemes.com/front-gutenberg-blocks/topics/header-blocks/