🚀 [AppCheck] Feature Request: Support Firebase App Check for Flutter Windows

[minhto2811]

Firebase App Check currently does not support Flutter Windows platform. This creates a limitation for applications that target desktop environments and want to enforce backend protection using App Check.

Problem

When enforceAppCheck: true is enabled in Cloud Functions, requests from Flutter Windows apps always fail because App Check tokens cannot be generated on this platform.

This forces developers to disable App Check entirely or implement workarounds, reducing security consistency across platforms.

Expected Behavior

Firebase App Check should support Flutter Windows (and potentially other desktop platforms), allowing:

Generation of App Check tokens

Proper validation of requests from desktop apps

Consistent security enforcement across all platforms

Current Workaround

Disable enforceAppCheck for desktop environments

Or conditionally bypass App Check, which is not ideal for production security

Additional Context

This feature is especially important for apps that:

Use Flutter across mobile + desktop

Rely on Firebase Cloud Functions for secure backend operations

Environment

Flutter version: (your version)

firebase_core: (version)

firebase_app_check: (version)

Platform: Windows

Request

Please consider adding support for Firebase App Check on Flutter Windows platform.