It's not official.
Photon for Construct 3 is an online multiplayer addon updated from SDK v1 to SDK v2 for compatibility with current versions of Construct 3.
It allows you to connect players through Photon Cloud, create and join rooms, exchange events, manage player properties, and build online multiplayer games.
The original features and ACEs have been preserved to maintain compatibility with existing projects. As with any third-party addon update, keep a backup of your project before replacing the previous version.
humbertofrakt.itch.io/photom-construct-3-sdk-v2