I know there is evidence of one but, to me, unless it caused the Siberian Traps, it was icing on the cake, so as to say. That was the largest extrusion of lava of which the geological records remain. There is also some thought that the Deccan Traps contributed to the K-Pg extinction.
The Siberian Traps didn’t cause anything but a little local discomfort, same goes for the Deccan Traps. And in neither case was there a massive increase in local volcanic activity all at once. Volcanic eruptions are not even a boil on the ass of a boundary event impact.