https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6404642/#:~:text=The%20empirical%20evidence%20gathered%20until,or%20even%20a%20direct%20loss.

There's a good amount of information on this article. Near the top, they list and cite instances where moral behaviour had been observed in animals. Where no apparent gain or loss occurs for the one behaving morally.

I understand your point of view, but you present as fact something that is currently highly debated theory. I try to posit only my views and opinions and try to avoid conflating them with facts.

I guess it's better to attempt to philosophise when dealing with our views on morality.