25w04a (yeah, took me a while) added a way to data-drive variants for wolves, cats and frogs, among with adding new data-driven variants for cows, chickens and pigs.
Foxes have a type value, that is not that far off from what a variant is - orange foxes spawn in biomes with no snow, white foxes spawn in biomes with snow. In fact, you can recreate these with a data-driven variant right now, you just cant apply this variant to a fox. So whats wrong with foxes, why did they not get the data driven variant treatment?
Thank you for your report!
After consideration, the issue is being closed as Invalid.
You have posted a feature request or a suggestion. This site is for bug reports only.
For suggestions, please visit The official Minecraft feedback site or visit the Minecraft Feedback Discord server.
Quick Links:
📓 Bug Tracker Guidelines – 💬 Community Support – 📧 Mojang Support (Technical Issues) – 📧 Microsoft Support (Account Issues)
📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki