You skipped the part where the mother said “you have no idea what it’s like to be a mother and how hard it is”. It was right before the part you quoted, strange you missed it.

I didn't miss it. I explicitly stated the neighbor reacted poorly.

So it was the mother herself who said she didn’t realize baby’s are difficult and cry.

That's....not what she said.

That’s what she’s saying when she condescendingly tells her neighbour the whole “you have no idea...” thing.

No, she's telling OP that she doesn't understand how mentally draining it is to put up with constant crying that you can't stop. And that's true - you can consciously be aware that it happens, but you really don't know how stressful it is until you live it. That doesn't mean you have no concept of the fact that babies cry.

And OP gave the suggestion of “if at all possible that if the baby can’t be calmed down to move them to a different room for a bit” - that was the suggestion as to what she could do about it so OP could talk on the phone/work in her own home.

And I explicitly said, "OP is NTA for asking her neighbor to be quiet."

Did you read the post or comment your quoting at all?

Did you read my comment before replying? Because it really doesn't seem like it at all.