After expiry and without an open entry, re-entry is in principle possible.
If the duration set under Section 53 FPG has expired and there is no open alert, re-entry is in principle permitted again. Until expiry the entry ban took effect across the Schengen area. With the end of the duration this effect ceases, provided no new measures are added.
For safety, carry the decision and proof of expiry. This allows the end of the ban to be evidenced at the border.