Are you sure it's not called LigmaNAS?
That might be a better name :) The project doesn't have as much visibility as it should because it's gone through several names over the last 20 years: FreeNAS (prior to the TrueNAS split), NAS4free, and now XigmaNAS.
It's great for people who just want storage and don't want the heavy features that came with TrueNAS' move to Linux (Kubernetes, etc.) or who want full control over vfs_fruit options for serving Macs.