The companies have provided ANN with 13 preview pages of the manga, viewable below:
The English digital release is the same as the Sailor Moon Eternal Edition version of the manga that Kodansha Comics is releasing in print. Kodansha Comics and Comixology released the first four volumes of the manga digitally in English worldwide on Monday. The volumes are available to purchase on Kindle and Comixology. Future volumes will release with the print edition of those volumes.
Toei announced at the "Usagi Special Birthday Party 2019" event on Sunday the manga is getting a worldwide digital release in 10 languages starting on Monday. Toei has not yet specified what other languages will be available other than English, or what companies will be handling the other localizations and releases.
Source: Press release