Is there any type of tool to edit in text and material to generate swatches?
More automated than selecting the filament and changing a Text Shape input in Bambu Studio?
Yes, that would be correct
There are openscad-based swatch customizers, search on the various sites and you’ll find dozens.
I’ve searched and I haven’t found.
I can make a rectangle of XX thickness in openScad no problem.
What I can’t do is this 
I’m not sure I understand, why not just use that one you posted a picture of?