Why do some (not all) sections on my Bitrix site turn out to be empty after entering text into them and saving changes when viewing sections?

Question

Template Engines

On my Bitrix site, some (not all) sections after entering text into them and saving changes when viewing sections turn out to be empty?
Where can I look at the component templates associated with a specific section in order to try to understand why the entered text is not displayed in the browser and is not visible to a person or a robot, while the other section is all right?