Like many others, I'm using the latest...
OS: Big Sur 11.4
Safari: 14.1.1 (16611.2.7.1.4)
iPhone: iOS 14.6
iPad: iPadOS 14.6
and having the same problem: only Console, Source, and Audit, and there's nothing in them – all blank!
I'm just a simple developer trying to make my way in the world, targeting CSS for a client's website.