One hurdle I have come across is that the law is worded as "Nursing mothers" and not every lactating woman is a nursing mother. I was a surrogate so have no baby at home but am exclusively pumping and providing that milk to the baby I carried and birthed. My employer initially said they didn't have to accommodate me because I am not a 'nursing mother' like the law names. I fought that and won the ability to pump at work but others may not have the same luck.
The phrasing of the law doesn't cover women who exclusively pump for their newborn, adoptive mothers or mothers via surrogacy who may be trying to induce lactation ahead if their child's birth and more.
The language should be more expansive to name "lactating individuals" as opposed to the specific "nursing mother."