I don’t see any trackers on my end
Yeah, there is hardly a good open-source cloud-based RSS feed service, let alone one that is private. I tried FOLO, but as @trkp2 said, there is an issue about the user agent that doesn’t properly update the feeds, so back to Commafeed. Selfhosting is not really an option for me right now, but after threat modelling a bit I found that, while E2EE feeds would be the best option, I don’t really have that much of a problem with it being plain-text, if that means I can use a cloud sevice. For this specific regard, I’ve put convenience over privacy and I’m happy with it.
The only one I’ve seen is some app report on diagnostics. Now it’s not even present.
Then commafeed is probably better since folo uses google tag manager and google analytics according to the Safari Privacy Report