A few days ago I tried out the Workspaces module in Drupal core. Chris McIntosh of Wembassy messaged about a module he created, called Workspace Plus. The module solves limitations around custom entities and Layout Builder, along with partial content deployments. 

I'm so excited about this module, I'm doing a quick follow up to try this out.

Here is their blog to introduce the module: https://www.wembassy.com/blog/module-introduction-workspace-plus