So I had a reply from Ninja Support:
“I wanted to let you know I have brought this to our developers’ attention, so we are looking into potential solutions.
For now though, I’m afraid I don’t have any more suggestions for this, unless you wanted to hire an Expert to recreate the feature in Projects.”
Not much of an answer and no quick fix in the meantime, unless I go through Codeable etc.
Be good to hear what you think? Could be a commercial opportunity to develop an add on to Page Builder?