While there are no current plans for a SFW version, we'll see how things progress
As for invert Y, there is an option for this in controls
This option can be accessed in-game and in the hub as well. (Though there currently is no options in the main menu itself).
In-game you can access this by pressing Esc/Space > Options > Controls.
If you are using gamepad, I will warn you that the controls might be really weird if you're playing on browser. This should be fixed when the new input system is implemented.
Unless you were referring to an issue with this option, or it not working.