When setting text-decoration-line: underline the property text-underline-offset is available. This property is not available when setting overline or line-through as values for text-decoration-line. As far as I understand, there is no text-overline-offset or text-line-through-offset property specified.

My current use case is that I want to implement an effect to hide text by moving a "colored box" over it. This should happen as a transition and each line individually and not just one "colored box" for the whole paragraph.
I thought about transitioning text-decoration-thickness of the underline from 0px to 1lh, but the underline is behind the text, so the text won't be hidden behind the "colored box". When I use the overline and change the text-decoration-thickness the overline moves away from the text. So I would first need to offset the overline to -1lh.

Is there a specific reason offset is only available for underlines?