Feeeed is pretty decent if you want one that is, well, like the name suggests, a feed. They have a TestFlight build, if you want to stay on the bleeding edge.
NetNewsWire, if you’re looking for a more traditional style. There is a TestFlight build for this as well.
Inoreader, if you want something that is a bit of both.
I have tried many, but they are all usually some variant of these three.
I can’t remember about inoreader, but the first two are completely free with no interest in monetizing, so you don’t have to worry about getting used to an app then getting hit by a paywall if you want to continue using certain features that you have grown used to using.
I believe you can donate to both, but it is not a requirement. Given that the majority of iOS app developers are greedy AF, this is a breath of fresh air.