After fighting in five professional bouts[9] she participated in The Ultimate Fighter 26 competition series and was subsequently signed by the UFC after the show.

[13] Robertson made her UFC debut on December 1, 2017, on The Ultimate Fighter 26 Finale against Emily Whitmire.

[24] In the lead up to the Frota fight, Robertson would begin training with Jose Torres and coach Din Thomas at ATT.

[27] Robertson was expected to face Taila Santos on June 20, 2020, at UFC Fight Night: Blaydes vs. Volkov.

[29] Ahead of her fight with Botelho, Robertson was given her black belt in Brazilian Jiu Jitsu by coach Din Thomas.

[30] During the COVID-19 pandemic Robertson left American Top Team with her head coach, Din Thomas and teammate Jose Torres.

[33] However, Lee pulled out in early December due to a broken nose and Robertson faced Taila Santos instead at UFC Fight Night: Thompson vs.

[42] Robertson faced JJ Aldrich, replacing Ariane Lipski, on March 12, 2022, at UFC Fight Night 203.

[60] She was also noted as having thrown the first legal 12–6 elbow under the Unified Rules of Mixed Martial Arts, since they were legalised on 1 November 2024, in this fight.

[62] Robertson has competed for the professional grappling promotion Submission Underground on several occasions while her MMA career was ongoing.

[63] She returned at SUG 20 for the promotion's end of year event on December 30, 2020, and submitted Pearl Gonzalez with a rear-naked choke inside regulation time.

[64] At SUG 22 on April 25, 2021, Robertson faced Liz Tracy and was lost by armbar in EBI overtime.

[65] She then returned at SUG 23 on May 23, 2021, where she faced top BJJ competitor Raquel Canuto and was submitted with a guillotine in regulation time.

[67] Robertson also took part in a bantamweight Combat Jiu-Jitsu tournament at Medusa 1 on October 2, 2021, getting submitted with a kneebar in the opening round by Nikki Sullivan.

[69] Robertson returned to the promotion at Fury Pro Grappling 6 on December 30, 2022, to face former two-time UFC Women's Strawweight Champion Rose Namajunas in the main event, submitting her with a rear-naked choke in 65 seconds.

[70] Robertson competed against Montana De La Rosa in the main event of Pit Submission Series 3 on March 23, 2024.