Hey! Good eye, never noticed this in specific.
Those variable wrap distances have gotta be put in manually, I think...? It's gotta just be manual line breaks I think. I can think of a way to do it automatically, but not a way to do it automatically and get good results every time.
If you're cool with manual line breaks, you can just set Super Text Mesh's anchor to be "Middle Center" (if you're using UI text, just align it "middle"), and then set the alignment to "left"? If autowrap is off (or on!) that should deliver the right result?
Also while testing this I realized that line breaks are acting pretty weird for middle-anchored text, so I'll be working to fix that shortly, sorry about that!