Multi-user wordpress plugin

Hi, I would like to know if there is a multi-user plugin for wordpress. I was already looking for this topic, but I could not find a solution.

In my case, I would like to create a basic wordpress program loaded with several themes and plugins, and also want to replicate the main wordpress sites to several copies. And most importantly, if I make any changes to the main WordPress site (for example, adding a new plugin or theme, etc.), I want to replicate the same to the entire copy of Wordpress sites. Is it possible?

Any suggestions would be very helpful.

Thanks in advance