What is the end of the PCT? Do you need your passport to officially finish it? Do you have to hike in and back to/from the border of Canada? is there an official tamale for bacon hand-off ceremonial exchange?
There are two ways to finish. Classically, before covid, one would reach the border and continue just over seven miles into Canada, finishing at a county-level park there called Manning Park. This is accessible by good quality paved roads from deeper in Canada.
During covid there was no entering Canada and hikers would simply turn around and return to the last trailhead south of the border (Harts Pass). It's 30.2 miles to the border from Harts Pass and so the round trip is 60.4 miles. The border's opening up again now, but one still needs a visa to cross. Even though the visas are pretty easy to get, lots of hikers are just turning around and returning to Harts Pass still.
And by the way, the Canadians have a specific name for the seven miles of trail from the Canadian Border to Manning Park. They call it the Pacific Crest Trail.