NSWRL Women's premiership started in 2018 same year as NRLW- Not sure where you get the idea that Souths and Sharks were the leading women's teams - prior to that it was the Sydney metro women's Rugby League -
https://en.wikipedia.org/wiki/Sydney_Metropolitan_Women's_Rugby_League
Premiers - NSWRL Harvey Norman Women's Premiership
2018 - Mounties
2019 - CRL Newcastle
2020 - No Comp
2021 - Central Coast Roosters Minor premiers - finals series cancelled
2022 - Wests Tigers
2023 - Mounties
2024 - Illawarra Steelers
Most of the Roosters NSWRL players come from the Central Coast Roosters and or Roosters Lisa Fiola Cup/ Tarsha Gale cup pathways/ Sydney Roosters Central Coast Roosters/New Zealand Academies
Uncle Nick has no more sway in the game than anyone else does - he just runs the Easts Group better than other clubs run their organisations - He's not a multi billionaire by chance.