isButtonReleased(button?: TButton | TButton[]): boolean

If any or certain bound button(s) are just released last frame on any input (keyboard, gamepad).
onUpdate(() => {
    if (!isButtonReleased()) return // early return as no button was released

    if (isButtonReleased("jump")) debug.log("Player stopped jumping")
    if (isButtonReleased(["left", "right"])) debug.log("Player stopped moving")
})

sincev3001.0