Prannoy was erratic while Jonatan looked rock solid in his defence as the Indonesian created a huge gap with a seven-point burst to grab seven game points. The Indian saved two before conceding the opening game.
The second game was a close affair as the duo moved together till 7-7 before Jonatan again opened up a 11-7 lead at the interval.
Prannoy was not able to sustain the pressure in the rallies, while Jonatan was composed and was rewarded more often for his cross court smashes and fine front-court play.
The Indian did well to claw his way back to 13-13 but a reversal slice helped Jonatan break the run of points.
The momentum shifted again as Jonatan led 19-14 with Prannoy committing a slew of errors. Another winner gave the Indonesian five championship point. Prannoy saved three before hitting the net.
In full flow, the Indian soon cruised to a decisive nine-point advantage at the interval. She kept a firm grip on the match to gallop to 18-4, riding on her alert front court play and precise returns.
Busanan continued to hit wide and long to eventually hand over 16 match points to the Indian, who pocketed the game and the match comfortably.
As for Prannoy, a former world number 8, he finished a creditable second best after making his first final in the last five years.
The 29-year-old from Thiruvananthapuram has been grappling with multiple health issues after being diagnosed with a gastroesophageal reflux disease in 2018 and COVID-19 infection in 2019.
On Sunday, Prannoy couldn’t match the accuracy and power of Jonatan, who looked in complete control of the final.
Sindhu rode on her attack to open up a 3-0 lead but Busanan started to stay in the rallies and she produced some good quality shots to make it 7-7.
Busanan tried to keep Sindhu away from the net, making her move across the court but the Thai was erratic in her finishing, allowing the Indian to go into the break with a narrow two-point lead.
Busanan used her deceptions and drop shots to dictate the rallies but Sindhu relied on her retrieval skills to stay ahead.
A precise return at the backline gave Sindhu four game points and she sealed the first game when Busanan went wide.