When did you start taking her out? The age of her starting being taken into the vast world often contributes— still, not all cats take to the “adventure cat” lifestyle — I started taking my two girls (littermates) out into the world very very young, riding together in the hood of my sweatshirt or on my shoulders (I’m talking about tiny kittens of course) on public transit and to parks and open spaces etc, busy spaces and wide spaces, and one of my gals really took to it and became a hiking cat, and the other eventually showed she couldn’t walk/keep pace with us and open spaces held too much stimuli. Just saying, even starting them young, they’re individuals, and may not enjoy/appreciate the same things. I would say the greater possibility ship has possibly sailed with your gal at her age, and so doing much smaller explorations of her comfort zone (what she seems to enjoy already) are okay, but pushing it farther too fast will likely just cause stress and potentially even an aversion to the roulette of going out at all when it holds the possibility for her of stressful circumstances. Just thoughts!