Missing Environments tab in GitHub Enterprise 3.0.1

My company just deployed GHE 3.0.1 today, so I can finally use Actions, however I cannot find the Environments tab in the repo’s settings. Tried both Private and Public repos, but neither worked. The documentation says that it’s in beta still - any idea how to turn it on?

The same here, can we use (or check at least) Environments tab somehow? it is not there at the moment