Is there any online resource or somewhere I can see this in practice? Or any newsletter, youtube channel that discusses this in detail?
My go to sources are open source repositories where I try to understand the code bases and some PRs. But I feel overwhelmed with the resources.
I can't think of any substitute for experience. You can read and study what you call concepts and patterns, just like you can read about baking a cake, but you can't get experience from study. You practice, make mistakes, stretch your abilities every day, and with luck you find good mentors.
Your focus should also shift a little bit more towards helping others, thinking about where the whole team is going, etc.
But give it time. As long as you keep learning, you will get there. :)