subsites
There are 3 repositories under subsites topic.
jesselawson/SharepointSheriff
A Sharepoint Online Powershell toolkit, geared toward automating migration tasks. A set of powershell tools to automate common and bulk tasks for those of us who have had Sharepoint Online administration dumped into our laps.
qobotv/2003page
The original 2019-2020 allEditSite source code, which had a ton of bloat problems. A newer repository has been made to resolve multiple issues.
Firesphere/silverstripe-subsite-solr
Support for Subsites in silverstripe-solr-search