Let’s not rewrite history here.
Suits was a modestly successful programme when it first aired. Its first season performed reasonably well, averaging around 4.2 million viewers, but those figures dropped fairly quickly, falling to around 2 million after a few seasons and ending at just under 1 million by the time the show finished.
I know exactly one person (my sister) who watched it when it originally aired. At the time, it was seen as quite a niche show in the UK. I remember seeing adverts for it on Dave but I don’t specifically remember Meghan from them. Meghan wasn’t the main character, nor was she the female lead. She was the love interest. She was a competent actress, but her screen time was relatively limited.
Meghan herself was well aware that Suits was her last shot of becoming a successful actress. She was also very aware that when the series came to an end, her options were limited, which was why she began networking in the UK and exploring opportunities around footballers and reality TV shows (she was linked to Made in Chelsea at one point) and then met a certain Prince.
Then came the 2023 resurgence. Netflix acquired the entire series and heavily promoted it on its homepage, prompting a new wave of interest (including the inevitable, “Oh, isn’t that Meghan Markle’s show?” curiosity). Once people started watching, they found an easy watching, bingeable series with story arcs that carried viewers through the seasons, and then they recommended it to their frienre.
That was what turned it into an enormous streaming success. This was long after the series ended, long after she became the Duchess of Sussex and long after Megxit.