Microsoft has removed the Office Lens application from the Microsoft Store. The program remains available on iOS and Android.
According to application support pageThe company it's mentioned that:
Important: Some cloud-based services in the Office Lens app for Windows, όπως η αποθήκευση εικόνων στο OneDrive, το OneNote, το Word, το PowerPoint ή το PDF, δεν θα είναι διαθέσιμες μετά τις 31 Δεκεμβρίου 2020. Μπορείτε να συνεχίσετε να usest other features of the application as installed on your device. Additionally, as of January 1, 2021, Office Lens for Windows 10 will no longer be available for download from the Microsoft Store. To continue to enjoy all the features of Office Lens, we recommend that you download and use the latest version of Office Lens for iOS or Office Lens for Android on your mobile device.
Η Office Lens application is no longer available from the Microsoft Store for Windows 10. Microsoft released Office Lens for Windows Phone in 2014 and later introduced it to Android and iOS. This application can read texts from photos and save them as a pdf.
The desktop app was a holdover from Windows Phone development and no longer served unless your device was a mobile device such as a phone or tablets. Like many other UWP apps. So it moves away from Windows 10 and remains available on iOS and Android.
As a mobile app it does a great job, especially on student texts with equations and strings, and we recommend you try it.