I’d really like to be able to lock a layer, but continue to work on its child layers. This would be particularly useful when working within a layer within an auto-layout.
I’m curious why you need this? Maybe what would also solve your issue is being able to lock only specific properties like position?
Aha, I just found that I can command-drag to select child layers. This solves my need. The issue I was running into was that dragging selected only the topmost parent layer. Photoshop does great things with layer management, but most of it would be overkill in the context of working in Figma.