I had this experience as well on AMS-BOM, which was a day flight, but I had to push for it and I was in F.
Basically, my inbound KLM to AMS was delayed so missed my 9w connection to BOM. No other connection from other cities was possible, so had to stay overnight. As luck would have been, wasn't carrying any change of clothes (new learning), so was pretty uncomfortable by the time I boarded the next day Flight to BOM.
Upon boarding the first thing I asked was pajamas. They said they don't give it in day flights 😡. I said if they could make an exception and they said there was none onboard. Then I had to tell her the story of my missed connection and stinking clothes and she had some sympathy. Or probably she thought it un-appealing to serve a badly stinking guy 😄. She said she will go and look in the other plane ( boarding was still going on) and ultimately got me an XL size piece. Have never been so happy wearing oversized clothes ever in my life. Though I doubt if she left the plane. Bottom line, I wouldn't have pushed so far if I wasn't so desperate.