She can hold her there for ever with very little effort but if she wants a submission, she’d do better to attack one arm only. Like Pamela Hensley here taming the prison bad girl, Julie Carmen:
https://youtu.be/xPuauaZCZr8?si=FOSw4TDZmBKcZ-1_(28 minutes in)
Or “Amy” here punishing the other wannabe for a sneak attack before the bell:
https://youtu.be/hnUK4m-V1iw?si=imT0D0thbVd9nEkKClumsy splicing together of two different takes; the hold is only being applied properly in the second one i.e. when she says “I give” for the third time (loud enough for everyone to hear her

). It looks like they took that from an unscripted fight in rehearsals or during the auditions and then shot the rest to lead up to it. That isn’t acting IMHO. She’s in real pain.