One CMS for multiple sites?

Question

CMS

Imagine there are 2 sites owned by the same person, hosted on the same server. How to centrally manage content?
Are there examples of how this should be done? How to separate to which site which content belongs correctly? It is clear that you can put the field with the name of the site directly into the document, but doing this check for each request looks like complete nonsense.
Here I, for example, made a simple CRUD on NodeJS / Mongo. How to realize this goal?

Answer 1

Yes, elementary: google -> multisite cms and choose according to your taste.

Answer 2

How to centrally manage content?

Correctly, the concept is extensible and can be controlled in different ways. Edit content? Enable disable site? Moderate?
It's probably in different databases
What for? It's just that your CRUD should work with two bases. But there can be a million implementation options, depending on the need and the technologies chosen.