The foundation used to fund development of Linux as it's sole purpose. How things have changed.
"Featured Projects":
https://www.linuxfoundation.org/projects
Linux is listed last. Simply put, the kernel is now mostly developed directly by developers on the payroll of those "Big Tech" corporations, which staff the foundation.
Pick a random one: "FINOS"
https://www.finos.org/members
Platinum donor: GitHub (Microsoft)
Another one: OpenSSF
https://openssf.org/about/members/
Premier members ($250,000) - $MANY_OF_THE_USUAL_SUSPECTS