Only this 2 branch of L56 has S/SC Asian samples. https://www.yfull.com/tree/Q-L940/ has three samples: Kerala sample, Pushto speaker from Pakistan, a Pakistani. https://www.yfull.com/tree/Q-Z5902/ also has 3 South Asian samples: 2 Sri Lankans and 1 Pushto speaker from Pakistan.
Some knanaya Christians from Kerala are under L939. Also I remember a Telugu L939 sample.