She didn’t offer to share because she believes men should always be providers of every single thing, even down to Sharwama - and it’s an anomaly to have it any other way.
You’d be surprised to see how many women are like this. At its core, it’s a societal issue.
I used to buy two shawarma when i was dating my now ex girlfriend every week. One for her and one for me when money enters my hand. We dated for four years. I was broke one good week, she went to buy one shawarma and turned her back to me until she was done eating it.