How can I search and find objects by their label in Inkscape 0.92?
I guess you're referring to the id of an object, but this approach might work even if you refer to something else.
Mark nothing or the whole image. Select the xml-Editor with the 4th button from the right in the tools menu, which shows an icon like this: <> (Hotkey: Shift+Ctrl+X).
A multipart dialog pops up. Hit Ctrl-F for find and you get a search field. Now type the id or whatever you're searching for.