Duplicate without user-selected canonical but its the Google canonical

Google search console lists https://mosachi.ga/ in the excluded section because it is "Duplicate without user-selected canonical". When I inspect the URL, it says

User-declared canonical       None Google-selected canonical     Inspected URL 

So it seems like google thinks it is the canonical URL. Do I still need to make it user declared canonical, and if so, how do I do that?