Can I use unity ads if my app not available on any store

Can I use unity ads if my app not available on any store ?? I want to drive downloads through social media. And don’t want to publish app on play Store.

When I registered an account in Unity Ads several years ago, I could use it without publishing.

Now, I switched to Unity LevelPlay (that can use Unity Ads in Mediation) and here, app must be published first before using it.

Assuming a mobile app, how are users supposed to download and install your app? Last time I checked this requires a rooted device. Even if there are ways to install apps legally or in a grey area, the downloads will be miniscule but for ads to pay off you need as many downloads as possible.

That’s not a problem for Android user. My user is optimised to side load app

So there’s no alternative? I can use??