Upon a little more checking it appears that the issue is that Boeing does not have a FAA TCE based anywhere in Europe. They drop in from time to time to do some BBJ checkrides for N registered aircraft but it's not a regular event. The sim is FAA approved but the manpower is unregulated. Go figure!
There still are TSA issues when using this sim for a FAA check but they are mitigated by not having the TSA/Visa issues being as paramount.