Hopefully - but even if that is the case, one has to wonder who designed it and what goals they thought they were meeting. There’s a reason that normal acquisition is through request-for-proposals that becomes competitive bidding and not single sourcing.
B2 and F117 were built in secret. I am not sure what the big deal is.
Often times you build a prototype, and then put the mass production out to bid. Also, I am sure somewhere in the AF budget, there was money allocated to design and manufacture of experimental aircraft.
These projects went through an acquisition process as well, just not one where the details are out in the public. Its done all the time. Its still usually competitive. On rare occasions its sole sourced, usually when the need is short fused and the tech/skills base may be very limited to a single company.