Basically, countries are either badly affected by the virus and isolated by other countries (Brazil), or relatively unaffected and isolating themselves from other countries (New Zealand). Qantas have removed international flights until March next year and are allowing the essential minimum services to be operated by foreign airlines.
Dubai tourism is mostly pax doing a 1-3 day stopover enroute rather than visiting the place specifically, and once is usually enough. France, Thailand, USA etc will draw repeat visitors but one bus tour and desert safari ticks the box for DXB for westerners. The nationals of countries that do go there for pleasure/business such as India or Iran are heavily affected by virus restrictions.
The flights operating at the moment are basically freight runs with a few urgent/must travel pax in the cabin.