Hello,
Some while ago, a website has been launched where you can upload scans of Flugbücher.
https://luftwaffe-flugbuecher.org/?page_id=12
On the home page it says:
As soon as we have a reasonable number of flight logs, we will digitize the data and start sharing it for free to the public through this website.
At the moment however, no flight log books are available on the website yet.