Ah. News to me. My device is still on LOS15. I also use https://github.com/OxfordHCC/tracker-control-android to monitor apps.

XprivacyLua works fine as a replacement but it requires Xposed Framework.

Do you know the reason behind it? Was it replaced by something else?

But hasn't this gotten very similar to the upstream AOSP 10 app settings? I know they are somewhat hidden, but you can change a lot about an App's behaviour and even fake location data for a specific App.

I didn't use Lineage with Privacy Guard (too old or too new devices)... so what's the TLDR on the featureset that's missing?

Might be worth creating an alternative for 10+ if there isn't any.