From the Warranty Guide
Your vehicle’s unique hybrid / electric components are covered during
the Hybrid / Electric Unique Component Coverage, which lasts for eight
years or 100,000 miles, whichever occurs first.
•
The following Focus Electric unique parts are covered during this
extended coverage period: high-voltage battery packs, high voltage
charger, DC/DC convertor, Electric Drive Module Assembly (includes
electric motor and gearbox), trans range and charge cord.
I would argue if needed that the charging port is part of the High Voltage Charger or Charge Cord and should be covered as any other unique Focus Electric parts.