Bare arms beside shoulder bows provide an alternative to an enclosed short puff shape. Fine straps rise from the pale lilac front. Longer bow tails descend at the sides from the shoulders. The patterned bodice meets in a V-like front, above a long wide skirt with a comparatively quiet surface. Between the side strips, the arms remain exposed. That distinction matters more than interpreting every added shoulder surface as a sleeve simply because it occupies a similar place in the picture.
Ask whether the longer side lines are your main attraction. You can then compare bare arms with a short enclosed curve deliberately. Keep skirt and front coverage as similar as possible on actual candidates. This prevents a different broad lower area from deciding your preference about the shoulder feature instead.
Bring hands forwards normally and observe the bands on the real garment. The photograph confirms neither removable parts nor conversion into sleeves. If you want a changeable arrangement, obtain specific information about the offered model. The visible open-arm alternative remains a complete design choice even without that additional function, and need not be treated as an incomplete sleeve.