How come the big tech is not more involved in crypto?

I somehow feel that the big names like Microsoft, Google, Amazon etc. are not really involved. Facebook tried with Libra but I guess U.S. gvmnt didn’t like the idea of a tech giant building a financial system? I know they are involved in some projects but nothing of their own making and it feels weird that these companies seem not interested as it would be natural for them to be at the front of this. They usually jump on every new tech but they turn their heads on something as big as crypto. Why is that? Or am I totaly mistaken?