Evidence of animals doing this exists. Unsure why anyone would be surprised theres evidence of humans doing this.
It's really wild to me how many humans believe their feelings are so different from animals. Most animals have similar incentives and desires, humans just have "better" tools to achieve them.
Grieving orcas have been found to move their dead babies around for many weeks. Chimps will fetch plants like Scutia myrtina, which is toxic in large amounts but acts as a anthelmintics (anti-worm drug), for fellow members of their group when they're sick. Elephants will defend their wounded and even bring food or water to them or help them stand up when they're struggling to.
Not sure why you're being downvoted. You're absolutely right. These types of behaviors can be seen all throughout the animal world. Especially for animals showing degrees of eusociality.
These feelings are also extremely important for the preservation of one's species. No wonder evolution took this approach in multiple occasions, animals tend to get lonely if they aren't kind to one another, leaving themselves open to get killed. The incentive is there to have strength in numbers, and being "emotional" in some ways contributes to further that.
It's really wild to me how many humans believe their feelings are so different from animals. Most animals have similar incentives and desires, humans just have "better" tools to achieve them.