There has been a big gap in the list of Alaskan airfields, since launch, mainly down to large amount of cloud that must have been sitting over the State when the aerial imagery was taken.
A list of missing airfields worldwide, and it was a long list, including PAEI, was submitted to Asobo by a very patient Insider, but that will probably need to await some renewed imagery before those airfields appear in sim.
Missing Airports Sent to Zendesk - Bugs & Issues / Airports - Microsoft Flight Simulator Forums Make your vote here.
However, some have appeared as freeware downloads, so maybe check those out to see if anyone has done or is going to do PAEI.