Buncha reasons not to.
If you build IC in Norway, first, that means a delay during which time Germany is taking those IPCs.
If you build IC in Norway with US, that means US must take. And then who reinforces, Russia? I doubt it. I think it more likely that Germany can and will retake to prevent the US IC. Which leads to the logical progression; UK takes, Japan can’t do anything about Norway, then US reinforces.
IC in Norway locks the Allies down. It becomes a point the Allies must protect. Germany can strategic bomb it. If US moves an AA gun over, that’s one less precious early game transport space.
If you have US transports, you can use those transports for a cumulative threat on W. Europe. An IC can’t do that. What is “cumulative”? You build transports US1, US2, US3. US4 you consolidate off E. Canada for major threat to W. Europe. Or whatever. Mess with Algeria. Lots of options with transports.
US transports also serve to soak up hits for the precious Allied navy.
PRACTICALLY, yeah, it’d be great to have a US IC in Norway. But there are just too many things Germany can do to mess with a Norway IC strat. I say - go for it if you CAN, but don’t try to go for a US Norway IC on the first turn. See if an opportunity comes up.