Normally they are picky. In an emergency, not as picky.
I suspect I frequent far more ladies rooms than you do.
I have never encountered a girl/woman who’d been caught out.
And over the years I’ve seen what’s been available in public facilities.
Another reason why I’ve never encountered a lady caught out without.
On a related note, from the US...
Note the willingness to purchase the super absorbent tampons.
Bet those won’t come with any warning label.