Open 0xr.space in the Meta Quest browser on a Quest 2 or Quest Pro, press Open and choose a file, then press View in your space. It works the same way as on a Quest 3: hands or controllers, the dock, section planes and exploded views. The free Model Explorer app on the Horizon Store lists only Quest 3 and Quest 3S, so on these headsets use the website.
These headsets have a slower graphics chip, so a heavy model opened from your files is shown as a lighter copy of about 350,000 triangles, half what a Quest 3 gets. A model over 2.5 million triangles, or with a thousand or more separate parts, waits for that copy before it is drawn. A Gaussian splat is held to about 300,000 splats on a headset that reports 4 GB of memory or less.
No. The Store listing is for Quest 3 and Quest 3S. The website does the same work in the browser.
The headset is showing its lighter copy, so it keeps a steady frame rate. The file itself is unchanged.
Usually, after the copy is built. A model whose copy cannot be built opens as it is, and may run slowly.
No. It is read and copied on the headset, and nothing is sent to a server unless you create a share link yourself.