You can view it in one of two ways, they don't accept foreign experience or you don't possess the minimum qualifications to be considered for a prior experience bid. On the bid they state minimum qualifications as...
- a Federal Aviation Administration (FAA) air traffic control facility; OR
- a civilian or military air traffic control facility of the Department of Defense; OR
- a tower operating under contract with the FAA under section 47124
Given what you posted above, you don't qualify for the bid. With prior experience new hires going direct to a facility, individual facilities are not set up to train and educate the basic nuances of FAA vs ICAO procedures like the academy is. As a US citizen you are still eligible for the all source bids and would go to the academy for basics. Did you apply to the last All Source bid in July?