Multi-admin is part of Matter
A device can be commissioned into multiple Matter fabrics or shared among participating ecosystems.
The user experience depends on platform support
The standard provides mechanisms, but actual setup flows differ.
Feature parity can differ
One ecosystem may expose a standardized capability differently or not surface every optional feature.
Matter 1.6 expands multi-ecosystem options
The 1.6 release adds Joint Fabric as another approach to multi-ecosystem device sharing.
Keep in mind. Compatibility is not permanent. Confirm the current manufacturer, platform and certification information before purchasing, resetting or migrating a device.