I have those files on my removable drive as well and it installed okay for me.When I look at the contents on the drive, it clearly shows 2022 EV6, but it also shows those ECOKMC files. 🤷♂️
EDIT: The system might not be letting you update since you previously installed the May 2023 update a few weeks ago. I know the build date changed but it's likely they didn't increment all software version numbers since they just made the update available again. As in, they did not release a 100% brand new update.