Can I still apply for restoration of my work permit if I am past the deadline?

No. Restoration is only available within a strict, defined window after your status expired, and once that window has closed, restoration is no longer an option regardless of the reason the deadline was missed. There is no discretion to extend the restoration window itself the way there can be some flexibility around other kinds of deadlines.

Someone who has missed the restoration window generally has no way to fix their status from inside Canada. The typical path forward is to leave Canada and apply for a new work permit from outside the country, meeting the eligibility requirements that apply to a fresh application rather than a continuation of the old one. Time spent in Canada without status after the window closes can also raise separate concerns that affect future applications.

Because the restoration window is unforgiving and does not bend for good reasons, anyone who realizes their permit has expired should check the current restoration window immediately and apply within it if at all possible, rather than waiting to gather every supporting document first — a timely, less complete application is far better than a complete one filed too late.