Ejecting Expo and integrate native SDKs

I’m building an app with React-Native that at some point to integrate some Native SDKs (nativeX, AERSERV, Fyber, …)

I don’t know what’s the best way to tackle this.

Building Bridges for all the ad Providers (nativeX, …)

or ejecting from React-Native and integrate the SDKs. In this case, what happens exactly after ejecting ? What if I need to build new feature with RN ? Do I have to add the SDKs evry time I eject ?