The Canadian, who announced herself to the tennis world when she won her maiden 1000 title in Montreal back in August, was far too good for her opponent, reeling off nine of the last 11 games. She is now a victory away from a second crown at this level.
At the start of 2025, Mboko was ranked 333rd in the world, but she is now projected to move into the top 10 regardless of the result in the final.
As well as beating Ostapenko, Mboko defeated Mirra Andreeva and Australian Open champion Elena Rybakina on her way to the showpiece event, and will face the winner of the other last-four clash between Karolina Muchova and Maria Sakkari.
"It is crazy, she was playing great tennis from the start, so I had to step it up. I'm happy to be here in the final," she said after the match
"I feel pretty good, it is part of the game, sometimes you have really long matches... it is important to rest up and take recovery... do everything I can to be ready for tomorrow."
Taking on last year's runner-up and the 2017 French Open champion, Mboko made a slow start to the encounter, going down an early break. However, she wasn't behind for long, getting the break back to level the score at 2-2, before winning four of the next five games to take the first set.
From that point on, Mboko took firm control of the contest, with her thunderous groundstrokes and stunning backhand causing Ostapenko all sorts of problems. She had little issue in the second set, and despite being broken back when serving for the match at 5-0, she got over the line on the second time of asking.
Mboko started the year in impressive fashion after reaching the Adelaide final, but was heavily beaten by Andreeva as she struggled with an injury issue. She was also comfortably beaten by eventual finalist Aryna Sabalenka in the Australian Open fourth round.