According to official site, (https://marketing.adobe.com/developer/get-started/mobile/c-measuring-mobile-applications) marketing cloud component is available. But, it is not there in Xamarin component search. PFA the screenshot.
Again, according to documentation(https://marketing.adobe.com/resources/help/en_US/mobile/xamarin/) we supposed to get .dll but its providing .jar file.
Please guide if I am missing anything.
You didn't miss anything, it use to be on that list. I have notified our team to see if we can get it updated. There is a direct download on GitHub. It can be downloaded here: https://github.com/Adobe-Marketing-Cloud/mobile-services/releases/tag/v4.4.2-Xamarin. Let me know if that doesn't work.