auto-placeholdering and layout builder

Right now the Layout Builder does not auto placeholdering blocks if they have bad cacheabilty.
Wouldn't it make sense that the layout builder auto placeholdering like the core drupal block system?

My use case is a small webform inside an layout builder node page. After I inserted the webform the dynamic page is for logged in users UNCACHEABLE.

Or do I have to implement an lazy builder by my own?

Thanks for help!