Add an option (checkbox) in the layout settings for "Page title type" that enables/disables appending the " | [site-name]" part to the page <title>.

I know the way to remove | Site name directly from appropriate file. But may be this can be done via admin?

I use module https://github.com/backdrop-contrib/base_meta but sometimes I would like not to fill it in and let the page title (h1) to be in >title< without default append | Site name.

Thank you!