Would you like to eat the same meal every day?
Our two cats are rescues who lived in the wild for their first 6 months. Initially, they were the easiest cats to feed, they would eat anything I put in front of them.
Having had picky cats in the past, before I realized how easy our new cats were, I had already bought every type of cat food and checked which they liked best. As it turns out, they ate all of them with no complaints whatsoever.
So we decided on the brand that looked the best to us (affordable but food that actually looks good). The cats ate it for weeks. And after those weeks, we noticed that they ate less and less of it.
We switched up the cat food, and they happily ate all of it again. But after a week or so, they ate less and less again.
Although our earlier (picky) cats never tired of their favorite food (the only food they would still eat); our current cats seem to favor variety. We've seen the same happen to their preferred treats, and even where they sleep. They never stick with a single choice for long, and they like changing it up.
The best approach for us now is to remove something they're not excited about, and move to something different. After they've not had something for a while, we reintroduce them to the original food, and they love it again.
From your description, it's possible that your cat has simply tired from eating the same food. Maybe she always liked the indoor food less than the other options, but was happy enough to eat it (if she's sufficiently hungry). However, repeatedly being served the same meal (that she doesn't really like) can result in her trying to find ways to get something else.
Cats have no way of signaling that they want something else except by refusing to eat what you've currently served them.
Give her something else for a while. If she consistently dislikes the indoor formula faster than the other options, then she clearly doesn't like it as much.
Unless there's a medical reason for her to eat it, I'd suggest you follow your cat's feedback.
You told your parents what you did and didn't like to eat as a kid, wouldn't you prefer it if they actually listened to you?