Is there an XML viewer with a feature to "hide" fields?

Question

Information Security

Greetings. I received a non-trivial question from the authorities, I find it difficult to answer myself, although I like the idea.
In general, is there some (preferably cross-platform) XML-Reader in nature that understands not only the markup itself, but also some specific tag properties, such as:
- collapsed="true" (when opening a branch, it should be collapsed)
- password="true" (close the output with *** characters and put the {eye} button next to it to show the text)
- copy="true" (put the {copy to clipboard} icon next to it, in combination with password allows you to copy the password without displaying it)
Maybe something else allows you to do something good, useful ...
PS. I understand that there are all sorts of password memories, etc. but the question is precisely about having a data file that can be viewed in absolutely any case, even on a virgin UNIX console, in case of urgent need, but in normal mode work with it without fear that some data you can "take a picture from behind" (the boss often breaks in somewhere in relatively public places and is afraid).