Jonas another gold medal in the inaugural GB Amateur Boxing Championships in 2010, when she pipped rival Amanda Coulson by one point in an exciting bout in front of her home fans at Liverpool's Echo Arena.

[8][9] Switching weights, Jonas took on unified female lightweight champion Katie Taylor in her next outing at the AO Arena in Manchester, England, on 1 May 2021, losing by unanimous decision with two of the ringside judges giving the fight to her opponent 96-95 and the third seeing the contest as 96-94.

[10][11] Again changing weight divisions, she won her first professional world title at her third attempt by stopping Chris Namús in round two of their fight for the vacant WBO female super-welterweight championship at Echo Arena in Liverpool, England, on 19 February 2022.

[21][22] She became a unified world champion for a second time by defeating WBC female welterweight title holder Ivana Habazin via unanimous decision at the Exhibition Centre, Liverpool, England, on 14 December 2024.

[34] In July 2012, Jonas appeared alongside Tom Stalker and James Dickens in Channel 4 documentary, Knockout Scousers, which followed her to Czech Republic and China on her pursuit for Olympic qualification, a production which she also narrated.

In August 2023, Jonas during her tour in Tanzania she appeared in Azam TV, where she shared her experience and motivated female local amateur boxers to encounter challenges they face in their careers towards substantial achievements in the sport.