I am creating a game in which there are five scenes (levels). In the first scene, the user enters his/her in the input field using keyboard. From scene 2 onwards, the game needs to be in virtual reality using VR controllers. Is it possible that in one scene I have input from keyboard without the VR glasses (the user sees the input fields on his/her monitor screen) or for remaining scenes it is VR with remote controllers?
You can always get input from both if I remember correctly. You would have to add a “screen space - overlay” UI and figure out how to show it only on the monitor and not in VR (no idea if this is possible).
However, you would not really want to do this as it just is awkward to use.
Instead add a virtual keyboard like VRKeys | Input Management | Unity Asset Store (free).