I am having the same issue. Tried with their support but the problem persists and only got referenced to the this forum and to the documentation. A current workaround: Editing an existing advanced experience is faster (within a day) than adding a new one (more than a week). We are registering subpaths with a generic card and then editing as we need them.

First time (around May 2023) it took around 24h to add a new experience, sometimes even just a couple hours. Last time I published one the 5th of December and took 2-3 weeks to start working. I published some new Advanced Experiences the 11th of January and even if they have 'published' status they are still not working properly.