Somebody scraped the play store and checked the framework, so a list for Android WebView apps, built with capacitor, is here: https://capgo.app/top_capacitor_app/ Maybe an equivalent is there on iOS for the same app...
It doesn't look native but who even cares. I think when a UI sucks or is unintuitive or buggy then "it's not native" is a sort of catchall easy complaint. Native is a crutch. Sometimes it's a good crutch (accessibility etc). But that's more about developer efficiency and bare minimums of polish.