Anka 3 is a flying wing. Theoretically with powerful enough engines it can achieve supersonic. But from engineering point of view, supersonic flying wings with such thin wings, will not be feasible.
The only way to make a flying wing supersonic is a
bi-directional flying wing as per NASA’s experimental designs show:
direction of supersonic flight
direction of subsonic flight.
A bi directional plane such as this which starts with subsonic then rotates by 90 degrees to fly supersonic is the way to achieve feasible flight.
Supersonic flight direction
NGAD is in essence half of such a bi-directional flying wing. It operates on supersonic delta wing form.
So in order for Anka 3 to have supersonic capability, it needs to have thin enough wings but in delta form as per any supersonic plane.
Just remember f14 when it used to close wings to form delta wing when going from subsonic to supersonic.