There are thousands of billionaires that support both sides. But not with mega donations. For example, 450M that Zuck donated on the previous election. I think Musk donated ~150M this election but that's all anyone would talk about.

When I talk about support, I'm talking about big financial support, not just "hey, I voted".

That doesn't count slanted media coverage, censorship on facebook, Twitter, that you really can't even put a price on.