It's a shame a duopoly controls one of the most important functions of modern society. Controls it, taxes it, prevents you from having a direct relationship with your customers ...
Egregious anti-trust.
In other words, these browser-tech-based apps show up in the app stores like any other app.
If you really do need the "slickness" of native apps, I wholeheartedly agree, go native, and use the native frameworks to do so.
The reason I don't like React Native much is that it occupies a "weird middle ground" - if you need the benefits of native, it's usually easier with less headaches to just go native (and big companies have announced ditching React Native due to this reason), but if you want to go cross-platform, there are other technologies that work better IMO.
I can point to a ton of RN apps that have incredible UX and surprisingly nice animations/interactivity, with what I'd argue is much easier to work with codebases. Maybe I'm biased, but the Uniswap app is really nicely done with all sorts of native views. They shipped the Android version of their app in just a few months, sharing 95% of the code with iOS.
I Androidland I mostly see websites pushing user to use apps, and users not using the apps because they're functionally identical to the website except they ceaselessly spam you with irrelevant notifications. Like the google app store feels cheap like a bargain bin, I don't think anyone expects to find anything serious in there.