Of Fire and Stars by Audrey Coulthurst (f/f YA Fantasy)
The Rules of Ever After by Killian B. Brewer (m/m YA Fantasy)
The Impostor Queen by Sarah Fine (m/f bi YA Fantasy)
The Princess Affair by Nell Stark (f/f Adult Contemp)
Cinder Ella by S.T. Lynn (f/f Adult Fantasy w/trans protag)
Bonus: Shira Glassman’s entire Mangoverse series features a variety of royals and representation!