Happened to catch the AGT final this evening and as cautioned, weird things can happen.
Here was her performance this evening. Very nice.
All Champions Performance: Angelina Jordan, Tyler Butler-Figueroa and Kseniya Simonov - Feb 17 2020
She has her own record label already, but if she decides to sign with a major or a strong indie, here is a long example of how it can work, coming out of these types of shows, in this case, American Idol, 2002 (first season).
Kelly Clarkson - Wikipedia
She made some bold moves with management, even before her second album, and became an executive producer and co-wrote all of the songs for her third album. She finished out the seven album deal with RCA, gathering several Grammys and other awards along the way, and switched to Atlantic in 2016.