I’m in a similar situation, I spoke with Emirates last night on what kind of proof they need me to provide as to my travel being essential and they said at the moment nothing. But they did say check nearer the time incase of any changes, I fly March 18th.
thanks Dave, the woman I spoke to on phone didn’t really understand when I told her I needed fit to fly as a separate document. She just said I’ll have to buy an additional doctors note from them