Well, first of all, the 10th Anniversary Project, Selector loth Wixoss, shows a lot of things. And most of my information comes from the Web Novels and Manga.
The Drama CD where Kiyoi and Akira become friends may be canon as in loth, Akira became a CEO of a beauty product company with Kiyoi as her helper. Meaning that she is still her friend in this Selector universe instead of enemies in the Lostorage universe.
So I would not say their relationship is “Retconned” and see the Lostorage series as an alternate universe due to this fact?
Another thing is that Ruuko, Yuzuki, and Hitoe go to different high schools instead of going the same high school like in Lostorage conflated Wixoss.
And I have seen and read it all via this link:
https://www.takaratomy.co.jp/products/wixoss/special/selector_loth_wixoss/
Just get Google Translate, and you will understand.