Install
This is the repository archive. It installs, but the folder name will carry the branch suffix and updates will not flow.
Install straight from GitHub with WP-CLI:
wp plugin install https://github.com/jvarn/custom-network-site-info-field/archive/refs/heads/main.zipNo built-in updater. New versions won't appear under Dashboard → Updates. Install new releases yourself, or let Git Updater track the repository.
This Wordpress plugin allows you to add a custom field to the network site info page wp-admin\network\site-info.php by using the network_site_info_form hook.
Usage
The sample provided here adds a single field called Custom Field with a label Custom Label. You will need to adjust these to suit your requirements.