Single post
You can find the Single Post option in the Customizer on Appearance → Customize → Blog → Single Post Customize Content Header…
General customize for theme sections and items
You can find the Single Post option in the Customizer on Appearance → Customize → Blog → Single Post Customize Content Header…
You can find the Static Page option in the Customizer on Appearance → Customize → Page → Static Page Customize Content Header…
You can find the Search Results Page option in the Customizer on Appearance → Customize → Page → Search Results Page Customize…
You can find the Product Single option in the Customizer on Appearance → Customize → Woocommerce → Product Single Customize Content Header…
You can find the Product Archive option in the Customizer on Appearance → Customize → Woocommerce → Product Archive Customize Content Header…