Hello, you can use bitmap font, like already mentioned before - check this thread: How is it possible in watch face studio to make week days function?
Or you can play with text opacity like we discussed here: Opacity vs day
Or you can use use mask for that.
Lets have one violet text SU MO TU WE TH FR SA (best evenly spaced using monotype font)
- make a white duplicate of it above the violet one.
- place rectangle, that could cover just one of the days abbreviations, right in front of the text. (mine was 39x55 at 54,256)
- select the top text layer and the rectangle above it, right click and use mask command from the menu.
- make the masking rectangle wander one portion of the whole text length a day using expression for the placement coordination X (mine was like this: