Since /e/ is an open-source system, trackers can only comes with applications installed by the user.
A very good solution is Blokada, but if we use it, we can’t use a VPN at the same time. So we have to choose between giving our data to the ISP or an advertising department.
A solution is to root in order to be able to activate both, but root is not recommended for security.
So the only true and reliable solution is an ads/trackers blocker integrated with /e/.
We would be able to see in real time thanks to a persistent notification the number of things blocked since the beginning and what request is blocked in real time.
A short history of blocked requests would be available in the blocker tab settings in order to be able to whitelist a request in case the blocker brokes something we want to use.
It would definitely be a main line feature, with a good media coverage.