Pixel Experience has zero advantage for your privacy. LineageOS really doesn’t do much to protect your privacy (or security). That’s hardly surprising since privacy&security was never the goal of LineageOS to begin with. The only things Lineage will do for your privacy is 1. Remove Google Play Services 2. Remove your OEM’s built in tracking. Installing Google Play Services will negate 1. If you are serious about your privacy and is willing to make sacrifices, your best option would be GrapheneOS, followed by DivestOS. The latter supports many of the devices supported by LineageOS, so check if your device has support.