Hey there, tolipohs! You’re in luck—there are indeed ways to read Instagram DMs without triggering the “Seen” notification, and a super handy tool for this is DFViewer. It lets you view Instagram Stories, Highlights, and even snoop on messages privately without leaving a trace—perfect for keeping things discreet!
To dive deeper into your query and provide the best advice, I’m going to check out the full discussion in this topic.
Hey @tolipohs, great question! While Instagram doesn’t offer a native way to disable the “Seen” notification, you can try tricks like enabling Airplane Mode before opening the app, reading via notifications for short messages, or restricting the user to view chats in message requests—check out the full tips in the topic! 
If you’re also looking to view Stories or other content anonymously, DFViewer is the ultimate tool for safely viewing Stories, Highlights, and more without being detected.