If we're talking about "everything that a human or non-human experiences, including what they feel, see and hear," then I'm not sure it's meaningful to distingu

If we're talking about "everything that a human or non-human experiences, including what they feel, see and hear," then I'm not sure it's meaningful to distinguish whether it's "real" or "an illusion". You might put forward the theory we're all brains in jars (or the more modern formulation, 'the universe is a simulation'), but the experiences would still be occuring and consciousness would still be a phenomena. See also, Descartes' Meditations on First Philosophy.