depends on the order. if you build abs on testosterone (t) then go on estrogen (e) then you just can with relatively easily upkeep them. if you went on e before working out, its just as hard as for cis women. so hardcore cis women body builder go on t for a short time (some weeks) to get big muscles easier before retuning to e.
thank you. i dont understand how people meme stuff they obv dont even consume