If you use Liftoff (which I largely recommend!) then you have to open the community or instance that you are interested in, and on the “about” tab (it shows the sidebar) there is a “modlog” button at the bottom, which if you click you’ll see the modlog for that community or instance.
You can open the main page of a community by clicking on it’s name when you see it (like in the header of a post), or by searching.
For opening the instance main page you basically click on the instance name until you see it. Most of the times it will get you there directly, but sometimes you’ll need to find and click the instance name once more.
Or you can open either from a search menu, of course.