The section was not found in the top level of the infoblock, how to fix it?

Question

1C-Bitrix

In general, this is not the first time I have encountered this problem and the difficulties of setting up the CNC when it is necessary to display sections, subsections and elements at the top level. Those. those elements that are at the top level, he writes that the section was not found. As I understand it, he is trying to find a section with the name of the element. Previously, I solved this problem by adding .html ( #ELEMENT_CODE#.html). But the client doesn't always like it that way. Are there any universal NC settings so that it displays an element at the top level, so the section can also display an element already in it.
Also another question, how does Bitrix process this cnc? If possible, the full algorithm is better. As I understand it, it is processed in the component itself? And before that? Those. Roughly speaking, where can I see the code "from" and "to".