I'd launched a magazine app on iOS in 2013, powered by the now-defunct TypeEngine. It was no-code from my end; I customized the colors and fonts, added icons and cover images, and their tool turned into a full iOS Newsstand app with paid subscriptions that they submitted to the App Store through my Apple Developer account. I then would publish content to their web-based CMS and it'd be distributed to the iOS app. That service isn't available today, but for a time it was a great way to build content-focused mobile apps (and today, tools like AppPresser offer something similar if you wanted to turn a content site into an app).

The closest things I've done recently would be to use Airtable to put together content, and then make a view to browse that content on mobile. Glide does this even better, as far as making your content feel like a real app—and Bubble lets you build out a lot more functionality without code, though again as a web app. You can add the web app to your homescreen to have something that feels like an app, without actually bundling a native app and publishing it to an App Store. Or, you could use Thunkable or PhoneGap (now Cordova) to package a web app (including Bubble-powered ones, with some extra work) into a web-powered native app you could submit to an App Store (though I personally haven't done that yet).

Have you tried Adalo? You can publish on the Play Store and App Store. As per their landing page, Draftbit will soon offer publishing to app stores as well.

Definitely give Adalo a try. For $50 a month you can publish to both App Stores as often as you need.

We have been using Adalo for a year and have been very impressed with the product. A must-try for creators

You could try AppGyver (recently bought by SAP)