Cleaners always bring their own supplies and nearly all equipment required for cleaning your apartment, with a few exceptions.
Cleaners do not provide:
Conventional mop and bucket;
Specialty products, including, but not limited to:
Heavy-duty bathroom cleaner;
Bleach; or Stainless steel cleaner;
They are happy to use these items, if provided by you, and left out in clear view for them and accompanied by directions on their use.