Issue with setting SEO title

Hi, I am facing issues while setting up SEO title.

I want to add [Site Title] as SEO title for homepage.
I want to add [Title] as SEO title for Custom post type called wp-manga. However, its not appearning at all. Please check https://fanstranslations.com/novel/believe-it-or-not-i-already-caught-you/

I also have something called [chapters] whithin Custom post type called wp-manga.
They are not custom post type. Example: https://fanstranslations.com/novel/believe-it-or-not-i-already-caught-you/chapter-52/
I want to make SEO of them as [Title] + [Chapter Number}

Are these possible?

The page I need help with: [log in to see the link]