Is it OK to say something is "buried" in a webpage?
Solution 1:
Yes. It is a commonly used phrase which means that some text or concept can be found in a page (of text). It also implies that alluded text is not easily found and is not highlighted or stands out in any form.
In some cases, it can have a similar meaning to that of "fine print" (which is used even when there is no difference in font size).
according to this definition:
"to consign to obscurity; cause to appear insignificant by assigning to an unimportant location, position, etc.: Her name was buried in small print at the end of the book."
Solution 2:
"Buried in the page" can most likely be understood by wide audience regardless of internet knowledge. However, it would not be considered "proper"as the phrase is a metaphor.
Consider something like, "The content is not accessible in a straightforward/obvious/clear/simple way" or "The content can only be found through difficult/complicated/obscure methods". There are many synonyms/antonyms to convey the "easy" or "hard" of finding the content.
The "buried in the page" metaphor would work in a spoken context in an informal setting. The above phrasing would be "proper" if you are writing a paper or making a professional presentation.