Search in a shared directory

Usecase:
I have a shared folder with another person.
That folder has A LOT of files!
How can that person search/filter thru those files (by name)?

(The browser search function could be used, but since it only loads a small part of the files list it cannot find the files not loaded yet)

Am I missing something??? Some option, perhaps… The person don’t see any search field on the shared folder