Not quite, I think. The supernova is more used to study the dark matter lens, which cannot be seen directly. Seeing the supernova being lensed by different part

Not quite, I think. The supernova is more used to study the dark matter lens, which cannot be seen directly. Seeing the supernova being lensed by different parts of the galaxy cluster will allow them to map the dark matter profile of the galaxy and study how it's distributed.