Google Play Store web view https://play.google.com/store/search?q=corona-warn-app&hl=en shows the current version of the Corona-Warn-App as 1.7.1.
When the Google Play app is opened, the current version available for installation is correctly shown as 1.9.1.
In Pixel 3a Android 11 emulator


Viewing the Corona-Warn-App in a web-browser on https://play.google.com/store/search?q=corona-warn-app&hl=en should show the current version as 1.9.1.
This is an inconsistency in the information display in the Google Play Store.
The availability of CWA Android 1.9.1 was announced five days ago on December 16, 2020 in https://www.coronawarn.app/en/blog/2020-12-16-corona-warn-app-version-1-9/.
@MikeMcC399, thanks for the report. Following you instructions I cannot reproduce this issue. This, with one difference, App is already installed. DS
@dsarkar
Thank you for checking! The website has been displaying the wrong information for several days and I waited to see if it would correct itself. Now one hour after I reported it, the site https://play.google.com/store/search?q=corona-warn-app&hl=en is showing the correct 1.9.1 version. 🤷♂️
Closing as no longer reproducible. 🙂
@MikeMcC399, They must have changed it just now ... ;-) Thanks again.