I'd had that thought as well - On the link it clearly states that it is made by Shenzhen RYZE Tech Co. Ltd and that all after-sales service and contact should be only with them.
Further down there is a logo which says "Powered by DJI", whatever that might mean...
If you do a search on that company you will find that the trademark application for 'Tello' was made by them only recently.
TELLO Trademark Application of Shenzhen RYZE Tech. Co., Ltd - Serial Number 87681970 :: Justia Trademarks and I noticed further mentions in a Google search of such phrases as "Powered by a DJI flight control" ...
The 'Learn More' link takes you to
Ryze Tech
Thanks for the clarification.