Do you have the list of what examples are needed to cover existing and new 5.2 functionalities ?
If so, everyone could participate, sending a coherent set of its own data or specially made to cover the need and illustrate one or more functionalities and you can check the entries in your checklist
I’ve a lot of events with an associated note “waiting for 5.2 to be attached to a place” i could share if that can be usefull.
About your KML issue, I’ve these contents I can share if they can be utile to you (KML file is linked in one of these tweets, in French but Tweeter can translate them for you):
https://twitter.com/plegoux/status/1450509216754671619?t=5I8K5vI0jM-OucgVqGxrhQ&s=19
https://twitter.com/plegoux/status/1450509222647582725?t=NXZ8Z5EVaJ_ww18RWCyUqQ&s=19
This tutorial in French and English show how to create these KMLs (I don’t know why the link display Notion ad and not my page header and image (Notion or Discourse issue?), but the link is the good one, you’ll be directed to the page):