From the most recent Seraphon Battletome on one of the few named characters, Lord Kroak
"No Relic Priest is more powerful, or more mysterious, than Lord Kroak. Waves of Azyrite energy issue forth from this withered husk, and his mere presence is enough to slay the weakest amongst the damned. It is believed he is the oldest of the slann, perhaps one of the few who arrived from beyond the stars with the Old Ones at the dawn of history, and that despite having sacrificed himself in battle against the
Eternal Enemy time and again Kroak always returns to continue the great war of the Seraphon. Kroak appears at those moments of greatest need, when fate must be tipped one way or the other. With but a thought Kroak can pluck a comet from the vaults of Azyr and hurl it across realms, unleash blasts of coruscating lightning,
or materialise a host of Starborne warriors. With the battle won he will disappear in a shimmering aurora of starlight, only to re-emerge when fate necessitates it. Some
skinks believe Lord Kroak has ascended to sit at the right hand of the divine Old Ones in death, unwilling to rest until the final defeat of Chaos has come to pass."
Generally they are refered in stories as male. Another example, though not AOS but close, is Total War Warhammer 2 where all the lizardmen voice acters are all very obviously male. And thats fine for when they were lizardmen, but there Seraphon now, things can change.