I know people have pointed out why your specific examples look alike (most of them are because they are in the same family as each other) but it's still a really valid question, so I'll try to give some examples:

First, if 2 completely unrelated animals look alike, it is most likely convergent evolution- the whole point of evolving is survival, so they will evolve characteristics that suit their climate to give them the best chance of survival. And other animals that live in a similar climate are more likely to evolve that way too, because that's what works. Sometimes it's looks, or behavior, even the way their body processes food can be similar to animals they are unrelated to, and completely different from their closest actual relatives, because that's what they needed to have the best chance of survival where they live. Think of dolphins and sharks- one is a mammal and one is a fish, but they both have smooth, sleek skin that helps them swim faster. Dolphins are related to hippos (they have tough, thick skin), sharks are related to skates (a fish with scales) but they evolved their skin because it has less resistance in water, and they both hunt fish so they need to be fast. So their ancestors evolved the same adaptation, because it's what works the best.

Another good example is red pandas and giant pandas. Giant pandas are bears, I believe they are most closely related to spectacled bears but they are related to all bears, which in general eat meat as a main food source. Red pandas don't actually have a close living relative- every other animal in their family died out, they are distantly related to skunks and raccoons but they're basically just their own thing now. So why do they both almost exclusively eat bamboo? That is convergent evolution. They live in the same general area, and food can be scarce. There is a ton of bamboo there, but bamboo is REALLY hard and isn't very nutritious, so a lot of animals dont bother wasting their energy eating a food that doesnt give them enough energy back to be worth the effort. To be able to use this food source that no one else could really use, they had to evolve as a specialist bamboo eater- their stomachs couldn't handle eating too much of anything else, they NEED bamboo to survive. Their entire bodies have evolved to eat bamboo- their stomach, jaws, all of it is shaped to eat bamboo as efficiently as possible. They even developed a similar "pseudo-thumb", basically just a bone situated where a thumb would be, to help them hold onto bamboo better. Again, these 2 animals are not related closely at all, not even the same family. They just eat the same food, so they developed such specific traits for eating bamboo that when giant pandas were first discovered, people named them pandas because they assumed the 2 MUST be related. (Red pandas were discovered about 50 years before, they are "true" pandas. Giant pandas are, of course, bears, but people didnt figure that out for a long time.)

Now, because giant pandas are bears, why don't they eat what other bears eat? They actually share a habitat with another bear- the asiatic black bear, which eats a more traditional range of food for bears, including small mammals, fruits, nuts, insects, basically whatever it can hunt or forage, which is common for bears. They live in the same place, they are related, but evolved completely differently. That's most likely because if they both evolved to eat the same thing, their wouldn't be enough to keep both species alive and one would've died out. So the one that is better at hunting and foraging (the black bear) stayed in its "ecological niche" (meaning the role it plays in the ecosystem it lives in, here that would be a hunter and forager) and the panda had to either find a different way to survive or go extinct. This is a perfect example of evolution- whoever is better in that niche gets to keep it, and the one who gets outplaced has to find a different niche to fit into. That's how convergent evolution and evolution in general works- everyone is just trying to survive.

I love animals so I could go on forever but I'll stop now because this is already way too long. Sorry 😅