For me it only works if I start cold and dark. There I can import payload and fuel from simbrief. But not if I start a short flight on a rwy. And often it is not possible to change the fuel because of the bug in the fuel page of the msfs. Cant insert numbers by hand and the bar is missing. Do not know if it is still bugs in msfs or fbw. Even the flypad cant add fuel on the rwy. That may be realistic but so start a short flight you always got 9500kg fuel on board. Annoying.