I have a lot of material I can share on (southern) Leopard. It's a little more complicated than just leopard paw strikes, there are Wu Xing Metal element techniques as well that fall into that category (e.g. Gold Fists Splitting Wood) Same techniques, different categories etc depending on the system you're looking into (and in some, they combine both like in the 10 Pattern Fist).
Hung Ga, Choy Li Fut, etc have a lot of written philosophy on Leopard, particular with regards to strength. Leopard is the animal motif for pure physical strength, compared to Tiger style training the bones (gwot). Technique wise yeah there are not many, and they are kind of scattered around different fist sets. But you can usually recognize Leopard, it's fast and powerful motion with the fists compared to Tiger claws, Snake hands, and even Dragon.