Not if you use Linux; app not available yet.
You can run Codex Desktop on Linux. It's on AUR already. Granted, just a repacked ASAR from Windows version but still does work quite well. Haven't tested connection to mobile yet but the integration with cloud environments already works.
The announcement doesn't make this very clear, but I think this talks to the Codex CLI, not the Codex App? (Or possibly both)
You can run Codex Desktop on Linux. It's on AUR already. Granted, just a repacked ASAR from Windows version but still does work quite well. Haven't tested connection to mobile yet but the integration with cloud environments already works.