I am not sure what you mean with seeing the data object in Piwik PRO, however, dataLayer objects can be used for triggering tags. More information about how to use dataLayer events to trigger your tags can be found here: Data layer event trigger | Piwik PRO help center
You could set up a custom event tag and fire it whenever the object that you mentioned is present in the dataLayer structure.
If you are new to Piwik PRO then I would recommend going to our Help center which contains a lot of useful resources which may help you get a good grasp of what analytics is and how our tool works. Here is a link to the help center: https://help.piwik.pro/
It seems that you only used Custom event category (Category in custom event tag) dimension to filter the report out. There are also Custom event action (Action in custom event tag), Custom event name (Name in custom event tag), and Custom event value (Value in custom event tag). Try including these dimensions in your report and see what the outcome would be.
what should I set the values of these dimensions Custom event action (Action in custom event tag), Custom event name (Name in custom event tag), and Custom event value (Value in custom event tag), Can you give me an example plz ? I set it is values to my variables name but this didn`t work