what approach is used to create a specific component that is only available for one platform? Can I use Custom Renderer or DependencyService or any other approaches is there ?
If you want to set the UI desinger on a specific control or layout .Such as entry or button.You can use custom renderer.
Custom renderers provide a powerful approach for customizing the appearance and behavior of Xamarin.Forms controls. They can be used for small styling changes or sophisticated platform-specific layout and behavior customization. This article provides an introduction to custom renderers, and outlines the process for creating a custom renderer.
And you can use DependencyService if you just want to call some native API .
DependencyService allows apps to call into platform-specific functionality from shared code. This functionality enables Xamarin.Forms apps to do anything that a native app can do.
And you can also use Effects.In some cases, all three can help you implement your requirements.
There are some relevant cases that use one of them to solve the issue.I hope they can help you better understand their differences and usage, and how to choose them as a solution in specific cases.