UI Builder - automatically set Activity stream entries to Expanded

[Jakub_Popielarz]

I'm playing around with creating an experience in UI builder to meet some requirements. I added a record form and activity stream to it. Now I'd like to have all Activity Stream posts automatically Expanded when the page loads. Is there any way to do this?
I'd like it to have pretty much the same effect as using the "expand all posts" option from more options in activity stream:

[Jakub_Popielarz]

Unfortunately I received the following information from Now Support:

Our dev checked the code and confirmed that this is hard-coded.

You can not make any changes on that option and that is the limitation. This is coming from the backend of the java layer. You can just use the functionality but can not perform any action on it.

That is the reason no documentation or data provided for that.

As per our understanding this is not a defect, but rather a design limitation in Configurable Workspaces.
A new feature is needed if this is to be made data driven.

If you feel that this would be a good addition to our product, please raise an idea.

I didn't create any ideas for this, as in the end it wasn't a must have for us.