There are certainly several prominent female characters, but I think the only time they interact at all is when Charity is playing with her young daughters, and they certainly don't say anything important, just cutesy mummy-child scene setting.

If the Bechdel test had a rule that the women had to be adults saying things relevant to the plot, I think this would fail.

It does pass, but barely. Its mainly just charity's kids (I forgot their names) and they talk about unicorns and mermaids

When Jenny Lind is introduced to Charity by PTB they have a brief conversation about her daughter's ballet. Plot advances as daughter then says she *is* doing ballet (now). Minor maybe but still qualifies, I think.

Definitely passes, by the slimmest of margins. The albeit brief conversation between Jenny Lind and Helen Barnum at 0:53.25-28 passes:

Jenny: “And what about you, Helen?”
Helen: “You look like a princess, ma’am.”

There are other lines of dialogue between female characters but they are most often about a man (often PT Barnum) or are part of a conversation with a man (often PT Barnum). This was the cleanest conversation between two naked female characters that is not about a man that I could find. Definitely passes all three parts of the Bechdel test!