There can never be a universally objective morality because morality must always be defined with respect to the goals of individual, sentient perspectives - which are oftentimes at odds with each other.

By contrast, there are, I think, universally objective rules of collaboration, which can be discovered via academic disciplines like game theory.

I've written extensively about the subjective nature of morality here: https://medium.com/the-panopticon-publication/morality-is-personal-and-tribal-always-20c8c31f5d29