Yes it is. Works 1:1 like the Steam Deck. Just to clarify as there are 2 models: The dark blue/almost black comes with SteamOs, the white model with Windows.

Good evening... Thank you very much for answering my question. Very kind of you. Greetings

Good evening... Thank you very much for answering my question. Very kind of you. Greetings

is with steam os

Hello, yes, absolutely. It's the only console outside the Steam Deck to be sold with SteamOS pre-installed, the result of a collaboration between Lenovo and Valve.