The widespread fan observance of a fanon queer (relation)ship as part of an accepted body of work in a piece of media due to an a priori assumption that the characters within the fanon (relation)ship are or will be confirmed queer and circular argumentation where the inevitability/conclusion of the (relation)ship is assumed as true, often to convince or mislead a non-viewing audience that the show includes and delivers on queer representation.
Queer-leading is done in place of providing or supporting actualized queer representation in media and often leads to the phenomenon where individuals begin engaging with a piece of media expecting queer representation and then get disappointed when media that never promised queer representation fails to deliver on that representation.
Person 1: "I can't believe ABC's 9-1-1 keeps queerbaiting us! How can it give us bi-Buck, but not canon buddie?"
Person 2: "Girl, that's not queerbaiting; it's queer-leading. 9-1-1 and ABC never promised canon buddie; fans on Twitter just misled you into thinking it was endgame."