[Unity(C#)] Tell me how can I display and monetize by showing ads?

Tell me how can I display and monetize Unity(C#) ads?

Develop a 2D application with Unity (C#),
How can I show and monetize my ads on the targets below?
・Amazon Fire OS
・Linux
・WebGL
・MacOS
・Android TV OS

Unity ads and Admob can only be used on Android and iOS, so
I'm looking for another way.

If I can display advertisements by the method you taught,
I will pay you a reward.