Im new to packages and just got access to xcode cloud. what does it mean "checked in"

I submitted a big report

this doesn't work. I tried downloading a .usdz file from the internet. it had a animation in it. I was able to see the animation in the quicklook (rightclick->quicklook) on the file. But when I tried doing it on a real device with Xcode using RealityKit and ARKit. its didn't seem to work. Is there any new guidance?

Interesting did u change anything?

Do you have a source or experiment you did that got you the 576 number? And the 64 VCSELs.