My son was born in February 2014. Benefits werent applied for. Applied with proof of primary care Apr/19. Will there be retroactive payments available? And at what length

Never applied for benefits, son was born February 2014. I recently applied as a primary caregiver(this was approved as I provided proof) and I see the next benefits will come, I'm curious as to whether there will be retroactive payments, and how far back they could be.