Unfortunately, LinkedIn does not show any Link Preview when I want to share my Flipbook. LinkedIns Sharing Debugger just returns a server error. Can you check why LinkedIn can’t read the meta data from Elfsights Flipbooks? And also it would be nice to customize the meta data (Title, Description and Image).
Hi there, @Marius_Hoppe 
Apologies for the delayed response! Our devs are investigating the issue and I’ll update you once I have their response 