This is the extension of All in One Wp Migration for who are running their website in multisite network mode. And the price starting from $319 per year.
Features of the extension
https://servmask.com/products/multisite-extension?locale=en
- Export single site from the network
- Export multiple sites from the network
- Export the whole network
- Import single site into the network
- Import multiple sites into the network
- Import a network
- Clone single site within a network
- Multi-network support
- Use on any number of websites that you own
- Unlimited Extension included
- WP CLI commands included
- Premium support
Probably you will need also All in One Wp Migration Unlimited Extension