It looks like Trump has been using her service for some time now, she did not backstab Trump. https://sputnikglobe.com/20241107/trump-says-will-appoint-susie-wiles-as-white-house-chief-of-staff-1120814352.html
Trump Names Susie Wiles as White House Chief of Staff
US President-elect Donald Trump said that Susie Wiles will become the chief of staff of his administration, the first woman to hold this position.
https://sputnikglobe.com/20241107/trump-says-will-appoint-susie-wiles-as-white-house-chief-of-staff-1120814352.html
In response mark kub to his Publication
Susie Wiles becomes chief of staff: Hardly anyone knows this woman, yet she is Trump's mastermind | blue News
Susie Wiles becomes Chief of Staff under Donald Trump. Hardly anyone outside Washington knows her - and yet she wields enormous power. Who is the woman behind Trump's triumph?
https://www.bluewin.ch/en/news/international/nobody-knows-this-woman-but-shes-pulling-trumps-strings-2439176.html