Plenty of options.
penetrating lube from the hub side.
Penetrating lube from the tire side.
Heat. Soldering iron for the careful approach. Cigarette lighter - position wheel flat for this. MAPP torch if you want some danger.
Shock therapy, ie hit it. Rig something up to act as an anvil, then hammer away. If it doesn’t break free, odds are good it’ll simply break enough to be removeable from the tire side. File or grind one side out, add more lube, then turn from the tire side. Split it with some pliers. Brass is kind of brittle, so it’s entirely doable w/o damage to the spoke.