Currently, there exists an implementation in community
https://firebaseopensource.com/projects/gitliveapp/firebase-kotlin-sdk/
But would definitely love to have official support.

This would be great to see. Would save some work in my projects. Though I hope to one support wasm/js. Seems like that would be an additional bit of work.

Would love to see KMP support for web and iOS & Android!

Firebase support would greatly increase KMP'a adoption, since it's a question often asked when suggesting using KMP for mobile applications.

I wouldn't say it's critical, you can create your own two (or more) native implementations, but it's near critical for the speed of adoption.

I need this to implement my app in iOS

I'd love to see Firebase coming to KMP!
The most important targets, to me, are Android, iOS, Desktop and Web.

Below is an **ordered** list from the most critical to the least critical Firebase service I'd like a Kotlin Multiplatform library/SDK for.
 
Also, very important, it's very important that this SDK improves the API quality to be Kotlin friendly:
- Use inline classes, inline functions where it can improve efficiency/performance.
- Leverage sealed interfaces/classes and/or enums for proper error handling, instead of Java-style exceptions.
- For all asynchronous operations, use coroutines, exposing suspending functions and Flows in place of error-prone callbacks.
 
 
Here's my (personal) ordered priority list:
1. Cloud Messaging
2. Authentication
3. Crashlytics (community solutions exist for iOS)
4. Remote Config
5. Cloud Firestore
6. App Check
7. Google Analytics
8. Cloud Storage
9. Realtime Database
10. Machine Learning
 
To me, iOS and Android support are the most important targets, but macOS, watchOS and tvOS can/should be added right at the start too since many APIs are exactly the same, and Kotlin supports those.
 
Also, WEB (Kotlin/WASM and Kotlin/JS), and Desktop (Kotlin/JVM) support would be very welcome since it's possible to make apps on all those platforms in one codebase, especially with the advent of Compose Multiplatform that is already fully stable for desktop apps.
 
If there's some research on KMP support in some libraries/SDKs, feel free to reach out to me, I'd be more than happy to help and give feedback on API design and other KMP related things!

Can we update the title to say "KMP" instead of "KMM"? Since JetBrains has stopped using the "KMM" acronym.

Still a valid request though 👍

Would save people a lot of time having to do the expect/actual bindings per each platform.