I have a block that has a block list of its own and I'd like to label it in the list. All fields except the copy of that inner block list's blocks are optional. I can use this:

{{ heading || tabs.contentData | umbCmsJoinArray:', ':'heading'}}

(from this site)

but since the "heading" field of the blocks being arrayed is optional, it ends up occasionally labeling the block as ", , , "

Is there a way to get the RTE copy (stripped of code and truncated) instead of the header text string?

Using Umbraco 13.4