Is it an Official Rollout or Is it a Test?

I had the 10 event learning phase and then it switched back to 50. I had First Conversion reporting when comparing attribution, and then I didn't. And then I did again. What's the common thread with these two features? Meta hasn't made an official announcement or updated Help Center articles about these updates. In other words, they are likely tests. It's a good reminder that until you see official documentation, that feature or best practice isn't official.