#1 The documentary is not 100% accurate

While the episode is largely well documented and portrays the rise of Becky Lynch to the top nicely, there are a few key aspects of her journey that have been ignored.
WWE mentioned that her turning on Charlotte at Summerslam 2018 was the start of this miraculous journey of her to the top, they portrayed her as a savior who spoke for the fans. Actually, this was not the real case as she was a full-fledged heel in the initial few days after Summerslam. She even blasted the fans for their continuous support for Charlotte and blamed them.
She was a proper heel in front of a best-friend Charlotte and was meant to hear boos from the crowd. Instead, the fans kept cheering her every night until a point when WWE had to embrace their love and change her into a fan-loving badass character.
I would encourage all my dear readers to check this episode of WWE 24: Becky Lynch, if possible. Do let me know in the comments section your take on her character change and journey to the main event of WrestleMania.