I’m trying to set up everything to promote my game with Unity Ads, so I tried making a campaign, I needed to set also tracking links and postbacks through a third party. I chosed Kochava because is the one recomended in the documentation and OOOOH LORD it’s being a whole piece of work to get it to work.
Postbacks were set up correctly, I confirmed this with the support team, but they weren’t getting the attribution for the installs though they were appearing in the analytics that the game was being installed and there were clicks tacking place through the tracking links.
My campaign was getting deprioritized due to this, so I reached the Kochava support and they told me that I needed Google Play Services and some packages to get it to work and attribute Unity Ads properly.
This is not the time I did a campaign and for my other game, I didn’t need to do such a thing, setting the postback and the Kochava SDK was more than enough and I got the attributions taking place with no issue
(Here is the image as proof)

They insist that I need Google Play Services so I got the Google Games Resolver to import all the components, but then I’m told to get this package as well: https://mvnrepository.com/artifact/com.google.android.gms/play-services-ads-identifier/17.0.0
How do I get this to my Unity project? Is there any shortcut for all this mess?