You have to be officially furloughed or laid off by your employer to receive unemployment. You are on voluntary leave (employer approving your leave isn’t the same as a lay off, it’s just them saying ok you can leave). You can’t receive unemployment if you choose not to work (I entirely support you not working right now so I am not judging, just stating a fact).

More so they just called you and ask you to return to work, and you said no, not yet. I don’t see how would that qualify you for unemployment? Your manager would mention that you were asked to return.