RRZishe I do not speak for the GrapheneOS project. But it might be available to devices set to use the alpha channel as quickly as days (as opposed to weeks).
Note that downgrade protection means that if you switch release channels to try out a new release you won't be able to switch back to the older GrapheneOS if you don't like the release you got via a faster channel. Neither switching release channels nor sideloading an older OTA image will work, so the earlier-access channels may be best for second devices or adventurous individuals.