I believe so. Information and videos of the construction activity can be found here: https://algoma.com/sustainability/
Scheduled for EAF startup (in phases) at the end of 2024 or early 2025, with the blast furnace scheduled to be phased out by the end of 2026. I think that matches the originally announced schedule.
algoma steel ARC furnace
algoma steel ARC furnace
are the ARC furnaces at sault ste. marie on schedule to be completed on time?