according to this doc
https://doc.starling-framework.org/v2.1/starling/textures/TextureAtlas.html
TextureAtlas with rotated is not supported.
however when I try it import a skeleton.xml texture.xml texture.png in to Dragonbone Pro with official importer. It display mismatch images. Looks like the rotated option , did not work.

this tool seems not provide a xml convert function