With the Quest, you have to buy through their store (unless you're using Link to connect to a PC.)
Re:Oculus Quest 2
by panopticon on Wednesday September 16, 2020 @07:42PM
(#24499420)
You can also use things like ALVR or Virtual Desktop to stream Steam VR titles to the Quest. But yes, that still requires a VR capable PC and stable wireless connection.
Most of my games are bought on Steam, not on the Oculus store.