The absence of double Olympic medallist P V Sindhu, London Games bronze medallist Saina Nehwal and men's doubles pair of Chirag Shetty and Satwiksairaj Rankireddy hurt India's chances.
A Group-A level government job has also been offered to the shuttler.
The 22-year-old from Jaipur notched up a thrilling three-game win over Hong Kong's Chu Man Kai in the men's singles SH6 class final.
The 38-year-old Noida district magistrate went down fighting to two-time world champion Lucas Mazur of France in the men's badminton singles SL4 class final.
Reigning world champion Pramod Bhagat claimed a historic badminton gold medal in men's singles SL3 class.
Sindhu, who bagged a bronze medal at Tokyo Games, is the first Indian woman to win two consecutive medals at the Olympics.
The 26-year-old world champion won the women's singles bronze at the ongoing Tokyo Olympics, adding to her silver at the Rio Olympics in 2016.
Sindhu became first Indian woman to win medals in successive Olympic Games.
Sindhu needed an extra dose of motivation following her semifinal loss at the Tokyo Games and that came from her father P V Ramana.
Sindhu, who won silver at Rio 2016, joined wrestler Sushil Kumar as the only Indian to have won multiple Olympic medals in individual events.