I messed with it for a bit and performed a bunch of troubleshooting steps and it finally showed up. I'm not certain what step ended up fixing it though. It was either just ensuring Armoury Crate was entirely updated (took multiple "update all" steps)...

I'm having the exact same issue. HWInfo does list it as the Astral 5080 but device manager just seems to show it as a basic Nvidia 5080.