Multi Domain Start Page Selection

We would like the ability to define which page is the start page for each domain we add to a site, ideally with a point and client selector in settings for the site.

By being able to define a proper page for each domain we can then have both page content and SEO data outputted correctly while still being easy to manage from pages.

Currently there is a liquid work around but this means the page content can't be managed in full pages: https://developers.siteglide.com/how-to-setup-a-multi-domain-start-page