Yes, Nugget is Ravi's son. Their familial relationship is a central part of their character's storyline.
Nugget's full name is Davinder "Nugget" Gulati, and he is portrayed by Juhaim Rasul Choudhury. The connection between Ravi and Nugget was officially confirmed when it was announced on September 21, 2023, that they would be appearing together in a significant storyline. This storyline was designed to explore their family dynamics, eventually leading to the introduction of Nugget's mother, Priya Nandra-Hart (played by Sophie Khan Levy), who is also Ravi's former lover.
This established father-son relationship forms a key aspect of their involvement in the ongoing narrative.