How to upload a WP Multisite from local to web server

Hello wpmudev-team,

I want to upload my multisite with subsites to my web server. The site is currently on my MAMP localhost.
Do you have a link to an tutorial? I asked my web host, they don't give Multisite live or email support?

I saw for single WP installations there is the Duplicator Plugin, but how about Multisites? That's a different story, right?

Thank you, Michael