If you want somewhere that definitely isn’t a liberal echo chamber there is always Lemmygrad. It’s so much not a liberal echo chamber that a lot of liberal instances have them blocked. It’s also awesome.
I think you don’t understand the term liberal properly though.
The web browser works fine for me, and then I don’t have a other app on my phone. I’ve tried a bunch of different apps, Jerboa, Liftoff, Wefwef/voyager, and connect, and I keep coming back to just viewing it in browser. Haven’t tried Sync because the idea of wilfully putting ads into a thing that doesn’t have them is disgusting to me.