Question Unity OpenXr works in play mode but build doesn't work

I'm new to unity and I'm trying to develop a game with virtual reality. I'm using unity version 2020.3.1f1 and an HTC Vive Pro headset and also using SteamVR.
From play mode of unity the game works perfectly but when I try to run the application from the build, SteamVR keeps loading, and from the pc I see the application starting but it stays still and doesn't load all the textures, but I can hear the audio.
I state that I have a single scene with different environments inside, and I move between these environments simply by teleporting the player from one side to another.
I tried to create a new project with only the player, and in that case I was able to have a working build, but as I try to insert even just one of the enviroments I have into the project, the problem returns, in play mode it works but the build doesn't. So I can't figure out if it depends on one of my environments or assets or if there's something else...

 

So I'm a super newbie, so this might be an obvious thing you've already tried... but I just had this exact same problem.

Go to the File Menu > Build Settings...
Look at the Scenes In Build at the top. It Scenes/SampleScene selected by default, but *not the one I had been developing on*. I checked the development scene and unchecked the sample scene, and everything works great! It also runs in realtime, unlike the laggy as heck scene player.

Valve Index on Win11 / 3080 RTX / 32GB RAM / i7 12700F