This isn't the problem that kubernetes solves, and pretty much every bank or big org I've been involved with have little fiefdoms fighting against teamwork... err I mean DevOps.
In finance at least, there are often regulators that get in the way. For example, in my current company, we’d love to support our anemic Ops team, however a developer having any kind of influence on the deployment process is strictly forbidden by our regulator.
I'm not entirly sure this is a regulatory requirement so much so, it's the solution to the requirement.
I'd need to look at the regs directly, but I believe just having different roles would be enough, i.e. not being logged in as a production admin all day long, and doing devops and CI/CD, would probably allow a dev to support production under break glass circumstances.