When I looked up the original post [https://www.thurrott.com/forums/general-discussion/hardware/thread/dynabook-ac-adapters-for-older-toshiba-laptops-recalled], the system indicated commenting was closed (perhaps after 30 days?). So here’s the update:
Exactly one day after the promised four-week processing period, I received a shipment email with a tracking link. Replacement delivered today. First charging cycle was without incident.