One thing I can note is that this thing probably utilises supercirculation lift pretty darn effectively like the Raptor.
The flat rectangular vectoring exhausts seemingly sit only a few percent of chord behind the wing’s trailing edge. That tight chordwise offset is ideal for circulation control. Any high‑energy flow issuing from those nozzles (especially when deflecting) can more readily re‑energize the boundary layer over the flap/wing junction and “wrap” around the wing’s bound vortex. Pretty sure that's how it works on the Raptor, except it has the nozzles beyond the trailing edge and this has the nozzles behind.