> Most megacorps use AWS. It's regrettable that your company can't, but that's pretty atypical.

Even then, it seems like you can run EKS yourself:

https://github.com/aws/eks-anywhere

"EKS Anywhere is free, open source software that you can download, install on your existing hardware, and run in your own data centers."

(Never done it myself, no idea if it's a good option)