I have many Numbers files. I attach a screenshot with a partial list. "Find" will not return any of them, with one exception: the file named "Bromptons".
As to the pathnames, so far as I know, Apple does not display any of that PC type info, such as "C/gobble/gobble/crank/root/fugedaboudit". I did note, however, that the "Bromptons" file was located in ICloud Drive. I am at a total loss as to how you give you the pathname other than I have. All I can glean is it is the filename followed by.numbers