Separation of registered users from guests (+ custom parameters and reports) - how?

Question

JavaScript

Good time!
Google analytics has a userID feature that allows you to share statistics between registered users and everyone else by adding a single line with uid to the analytics code ( https://support.google.com/analytics/answer/312366... ​​).
However, Yandex.Metrica is also needed, I would like to have the same feature here. But how?
I read the manual on user parameters, added the code to the site:

w.yaCounterXXXXXXXX.params({ uid : <?= $uid ?>, registered: <?= (int)!empty($uid) ?> });

In the "Content" –> "Visit parameters" section, the parameter values ​​are not visible (only the fact of their presence).
Actually, there are two questions:
1. Where to enable and how to use a setting like "view this report only with the label registered = true"? There are no user variables in the report designer in any column (including "Under conditions").
2. How to sort/filter the values ​​of user parameters, and not just the fact of their presence (for example, it will be necessary to track a parameter with more than two string values)?
Thank you!