From the Plugins page, you can access your Plugin sets.
A plugin set is a defined group of plugins that will be installed once when we deploy a new site. On the Create site page, you can select which set you want to use.
Creating Plugin Set
In the Add new Set form, you need to define the name of the new set and select which plugins you want to add to it.
The search input will display all public plugins from the WordPress plugin directory and any custom plugins you've uploaded.
When you update the set it will only affect new sites which will use it. It won't update plugins on already installed sites.
This won't affect already installed sites. Plugins there will be untouched.