Theme Elements Missing for Blog Posts

Hello,

I’m writing a new blog post and theme elements that allow me to modify each individual blog page are missing such as title and header options, changing backgrounds, colors, and the icon for my site at the top. It’s all missing.

I’m horrified. All I see is the visual text and my Yoast SEO. That’s it.

Please help! I have no idea what happened or what I need to do. This is absolutely awful. I’ve gone to older blog posts and it’s missing on those too.

Thank you so much!
Erin