Uncanny valley problem
I use flutter and have played with their tool and google appssheet.
You definitely end up in a place where you get blocked eventually. It’s a great example of the 80/20 rule at the extend in that the first 80% of the functionality is done in 20% of the project time. But that last 20% of functionality is going to be a hell ride due to the Low Code environment getting in your way .
Theee are many other teams working on this area using very different approaches that solve that low code / full file inility dilemma.
Many are using wasm on the web, mobile and server.
Also after using flutter for 2 years and thinking it was the best thing , I have moved on to using other platform architectures that are leaner that are based on wasm. Flutter is very very complex under the hood , and in fact t like most google code based definitely overly complex . A bit like Kubernetes in that way. Google tends to makes things more complex to everyone’s peril.
The next thing in Low Code will be wasm and the ide and the compiler will itself run in the browser itself . Flutter can’t do that due to its heavily reliance on skia, harbuz and other libs they reused from chrome to make flutter work.