Absolutely! If you want to express “How did I not know about this? Learned something new!” in more detail, you could say:
How did I not know about this until now? 😅 I honestly had no idea, and it’s surprising how something so simple can be overlooked. I definitely learned something new today! It’s always interesting when you come across information that makes you stop and think, “Why didn’t I know this before?” Definitely glad I came across it! 🙌
If you want, I can also make it more natural, funny, enthusiastic, or social-media style.
