Install the JDK and the Arduino workloads:
sudo apt install openjdk-11-jdk sudo dotnet workload install maui-android android
Install the Arduino SDK. The easiest way is to install Android Studio and while installing install the SDK as well.
For Android builds to work the MSBuild property AndroidSdkDirectory needs to be passed. The path should be ~/Android/Sdk when installed through Android Studio.
If using Rider the MSBuild property can be configured as a global property in the settings at Build, Execution, Deployment » Toolset and Build » MSBuild global properties.
Note: Remember to save the configuration in This Computer.
Also install the Xamarin Android extension to support running and debugging the app directly on a device. Note: Debugging (or running) might not work due to an error but the app is deployed.