Why can’t I delete or move locked layers in the layer tree? Why are they locked in the first place?
The layer tree gives you an overview of the entire structure of each page in your site. Most layers can be freely moved or deleted, however, you will notice some layers are locked. The reason they are locked is to prevent them being removed or moved out of place as this would simply break a sites layout and functionality.
Users do not have the ability to lock layers within Blocs, it’s all managed by the software to ensure page code structure remains valid.