When driving into Valle Verzasca, Cascata di Val Mött shows up at the right side of the road between Brione and Gerra. There is a parking in front of the waterfall (gps 46.315207, 8.802995) with a great view. Note: you have to pay for the parking but that goes for the whole valley!!!!
I was visiting valle Verzasca July 2021 and the waterfall is easy to spot. I was there early in the morning and the sun was right above the waterfall, impossible to photograph. But I was heading to more waterfalls in the valley so on my way back it was a little better. In the afternoon you shouldn’t face problem with the sun shining in your lens.
From a distance the waterfall is nice to see but not very special. Maybe if you walk to the base of the waterfall I would be more enthusiastic. You can walk a little closer to the bridge in front of Cascata di Val Mött from Gerra. A trail runs at the east side of the river to the viewpoint on the pedestrian bridge with picnic facilities (5-10 minute walk).