Proof

@mattermost/react-native-emm

native-seam only: the published wrapper runs unchanged over an Emm TurboModule reporting the unmanaged, unsecured device state a browser preview actually has
35%
API coverage
No visual proof cases have been published for this package yet. The registry summary below describes what the compat layer implements.
Working
module load and getConstants, getManagedConfig returning an empty policy so the app takes its unmanaged branch, deviceSecureWith reporting no face/fingerprint/passcode, the listener bookkeeping, and setAppGroupId/openSecuritySettings/exitApp accepted without effect
Missing
no EMM policy controller, so a managed configuration is never delivered; authenticate rejects because there is no device credential prompt, and setBlurScreen/applyBlurEffect/removeBlurEffect do not obscure the app in the task switcher