As of April 4, 2022, with the release of NOOK Software Version 6.1, the ability to purchase has been removed from the Barnes & Noble NOOK App for Android and the NOOK HD 10” Designed with Lenovo.
Digital content purchases can be made on BN.com using the account registered to your NOOK account, which will then sync to your Library. Additionally, you can add books to your Wishlist from the app, which will sync with your Wishlist on BN.com so you can remember and purchase your favorites easily.
If your app has not updated, you will be able to continue purchasing through the app. However, once you install the update, you will not be able to roll back to the previous version.
This update does not affect any NOOK devices other than the NOOK HD 10” Designed with Lenovo.