That's correct. The Bifold is an Eric Glesser design, intended to be a creative lock and opening style for a Swick/SPOT-style knife. Unfortunately, some ban-happy bureaucrats decided it was restricted, like autos and butterflies (same as with the Janisong as you pointed out), so they aren't generally available to prople who aren't military or first responders.
If you like the Swick/SPOT style as I do but fixed blades are inconvenient or restricted, the Introvert is is cool backlock flipper that is like s Swick when open. Discontinued but you might be able to find one.