https://dailyhive.com/vancouver/amtrak-cascades-vancouver-seattle-restart-2022
Of course on the BC side its still mostly a single track corridor.
By now the New_Westminster_Rail_Bridge should have been twinned.
https://en.wikipedia.org/wiki/New_Westminster_Bridge
The Steel_Bridge in Portland has 2 heavy rail tracks on the lower level.
https://upload.wikimedia.org/New_Westminster_Aerial_view_2015.jpg Where as the NW & BC approach is to have the minimum amount of bridges possible. There was such a lack of vision for NW as plumbing & wiring were brought into the west coast of Canada. The rail corridors in Greater_Vancouver have always been lacking, as is the road network.
