Megan Ramos (Jason Fung’s clinician) had a few articles on thefastingmethod where she implied exactly that: especially for older women, clean fasting is the way to go. If you’ve stalled, the there’s no harm in trying it.
If anything, you could try eating less calories on eating days. But it’s pretty unlikely that you aren’t at a caloric deficit while doing ADF, it’s just that weight loss slows down as you get closer and closer to your goal weight. So just keep up the great work and you’ll lose the weight eventually.