We’ve transitioned from Sketch to Figma too, and are slowly moving things away from Zeplin at the moment. Maybe its a designer thing too, but I was testing out this issue and had a similar problem, that I only want a developer to be able to click the top layer - especially when I’ve dragged in global icons from our library. Just something that we’ll need to train our devs on if they don’t know already.
What is also slightly annoying on top of this is that marking an icon/layer for export in your global library does not mark it for export in your working file. So you have to still go through the trouble to marking them all again.