Your friend needs to get a damn grip. I'm 52 and I still get doors held for me, I still get put to the front of the line, I still get everything I want. Granted by an accident of genetics, I do look younger than I am, but that isn't the point.
The measures you've outlined scream insecurity. It highlights a woman trying too hard to be 20 when she isn't. Nobody likes that and it's so painfully obvious it's a joke.
It's fine to want to look your best. But a woman can be attractive at 50. It won't be the same as attractive at 20. It just isn't. She needs to find her worth within herself. If she's still looking for people to put up with bad behaviour and wanting freebies, she's not lost her pretty privilege, she's just a very spoiled entitled person.
I get what I get because I don't demand or expect it. I know I'm 52. I know I'm not 23. I don't hand around with kids. I don't listen to their music if I don't like it. I don't kid myself. Your pal needs to grab some self esteem and self respect. There's a place for us as attractive, mid-life women, but not when we're trying to pretend.