FSE themes w/ fixed front page template: how to change that?

Hi there,

I am using an FSE theme with a dedicated front page template, so I can not just set any page as home, but have to edit the front page in the template editor. While I can see the appeal of this approach, I’d prefer to kind of un-link the front page template and set a regular page to home (thus giving the client easier access for modifications).

In a child theme, is there a way to do so via functions.php or theme.json?

Cheers,
-Martin