First of all, you can make Android apps with Nim using the traditional NDK APIs and amazing libraries like https://github.com/yglukhov/jnim and https://github.com/yglukhov/android.
Secondly, that project seems to be dead (not active for over 9 years), which is not that good :P
Yes - there are many ways to use Nim on Android. Depending on what kind of App you want, there are different approaches and different best practices to get started.
I created an example for a Nimview todo application https://github.com/marcomq/nimview/tree/main/examples/android which uses Html/Css/JS as Frontend. It is in an early stage and still hard to debug on Android. But it works if Android Studio is installed with Ndk and if npm is available.