WordPress Multisite with Different Domains

Hello Everyone,

I have been trying to create WordPress Multisite with different domians.
How can i achieve that?

For Example :

My Current website is: https://www.domain.com
What wordpress multisite provide us is to create:
https://www.domain.com/subdomain

But i want to create 4 different website from one admin panel.
i.e 1) https://www.domain.com
2) https://www.domain1.com
3) https://www.domain2.com
4) https://www.domain3.com

Super admin will handle all the above websites.
And he will be able to create or delete users.

And Domain mapping is not helping in this.
What domain mapping do is it redirects the url: https://www.domain.com/subdomain to any external website.

But super admin is not able to handle the users of external website..

Thanks in advance.