You build software, you ship it on an OS so it works, cool, this makes sense (I assume you need hardware and VM support, not just VM).
Why would you accept additional risk on the OS if you can easily reduce the risk, and ultimate cost, by going with an OS that has vendor support written into the actual contract? RHEL is 11-13 years total, Windows is... I'm guessing my grandkids will be using some form of Windows 10. CentOS is, and always was a community "best effort", with some serious delays occasionally (not often, but it happened).
A RHEL server license starts at $349, I have to assume that's at least an order of magnitude (or two or three) less than the cost of your software based on the technologies involved (sounds enterprise-solutiony). In other words a rounding error overall.