Ridley Scott is executive producing the new series, which will be showrun and primarily written by Silka Luisa (Shining Girls, Strange Angel). Alcon Entertainment, which recently produced The Expanse for Amazon, is the production company.
Staffing up is underway, with Amazon having already greenlit multiple scripts and production dates already being considered. Apparently Amazon are courting Scott to direct the first episode.
The rapidity of the project may raise eyebrows. Blade Runner 2049 was only a modest success, making $260 million on a production budget of ~$170 million. The filmy likely only just squeaked into profitability on the basis of media and streaming sales. However, the film has had a solid long tale and its director, Denis Villeneuve, has since enjoyed a much bigger hit with Dune: Part One, which may have encouraged people to seek out his earlier work.
Although neither film has been a huge financial success, both have enjoyed immense critical acclaim, which Amazon may be hoping translates into a solid home audience for a further continuation. However, by setting the movie a full fifty years after the events of the previous film, it looks like they are not thinking of having any continuing characters.