Live in Wayfarer 3.1 is a new set of acceptance criteria! Please browse the information in this category with caution as it is in reference to the previous review guidelines. To learn more about the new criteria, see here: https://niantic.helpshift.com/a/wayfarer/
Is there a way to ask why approved locations are not in place?

I have two of my nominations that have been approved that haven't been put in place. There are stops around these locations. They aren't stacked locations either.
One of them is a little library that in at the local park and another is a historical placque describing the history of the area. In the same park and further away from the next closest stop that the "short hoop" basketball court that was approved and put in place.
Answers
they share cell? Are they far enough apart?
There's a bug that's stopping syncing - see known issues
As @Faversham71-ING said, there is a Known Issues discussion covering this topic.
Also, keep in mind that not all approved Wayspots make their way across all of Niantic's games. Niantic has at times blocked areas and hinted at other things that may keep Stops & Gyms from syncing.
tienen que estar ciertamente separadas una de otra