Content creation

In the Quiz activity (question set), can we reuse activities already designed, i.e. use it to bring together several ready-made activities? I can't figure out how to do this, as I have the impression that you can only add new activities that you create inside the Quiz. Does anyone have the answer?

Is there a way to change the colour on the left side bar of the Documentation Tool? Users may not realize they can click through the pages using the left side bar tool - having colour would draw attention to it and would also make the activity pop on the page: Also wondering if there is a way to change formatting in activity heading (ie changing to bold and/or adding colour)?

The docs mention: Copy/paste feature works only within an H5P site, not between different H5P sites. To reuse content between sites, use download/upload option.

I wanted to ask if this is intended or not. Having the ability to do that would significantly impact my workflow so I was wondering if there is a workaround for it in some way or if this is a feature that we can request.