The Unity Hub also allows you to add build support for additional platforms and maintains a list of recently opened projects.
When installing Unity, we recommend you tick "Android Build Support" which installs the required modules; OpenJDK, Android SDK and Android NDK
While the Unity Editor is a convenient way to develop your game and make sure everything is working, it is a good idea to run your project regularly on a real target device. Bottlenecks, if any, will not necessarily be the same across all devices and development platforms.
The Profiler window provides information about many areas of your app, not just CPU and graphics. Developers of applications with complex user interfaces will likely find the UI section useful, particularly batch counts as they can affect rendering performance. If your application has heavy memory requirements or makes frequent smaller allocations, you may find the garbage collection statistics useful in the Memory area.