Is there any easy way to tell a releases current state / channel? Couldn't find any way to tell what's the latest version for each stage and device.
Easy way to see a versions current channel (alpha/beta/full-released)?
RAYs3T I don't think there is a GUI way. Here is how the update server works.
There are lists at https://grapheneos.org/releases for the beta and stable channels. We don't currently list the alpha channel there. You can always just open the metadata files manually.