No two readers have ever experienced a book the same way.

Whether or not the author intends it, a reader will read from their own lens of worldview, experiences, and yearnings.

I am curious though, this fear of missing out on symbols, would it be fair to say that you have readers FOMO?

Take a deep breath, and remember that books are organic, and they come to life differently in every reader's hands. So sit back and enjoy what any book brings to you. You may even pick a theme or two that the author never intended; but it will be just as valid because that's how you and the book interacted.