Because on all platforms the sales are applied to Disney + which is wholly owned by Disney. They are not wanting revenue to be decreased though middlemen.Why not release it on iTunes, google play, Vudu...etc? Give it a chance to reach a wider audience??
Disney+’s global reach extends to Australia, Austria, Canada, Channel Islands, France, Germany, India, Ireland, Isle of Man, Italy, Japan, Monaco, Netherlands, New Zealand, Puerto Rico, Spain, Switzerland, and the United Kingdom, as well as the United States.
2 weeks later on Sept 15th D+ is coming to Portugal, Belgium, Finland, Iceland, Luxembourg, Norway, Sweden and Denmark.
This is also being shown in movie theaters in countries that have them open such as Canada, China, South Korea.