The perfect cross platform framework

There's a lot content out there about the "perfect" cross platform framework and why you must use it.

But lets be honest almost everything is bullshit, just saying what you want to hear to keep you engaged.

What really matters is how it behaves in real world scenarios.

At the moment I'm looking at Tauri, React Expo and flutter.

My key points are: - maintainability; - consistency, not to look the exactly the same way, but to work the same way. - security, keep source code (not sure if exposing code is considered a security issue) and user data safe. - offline support, some shared code logic between back and front, eg. create invoice

Any real world and production experiences that can be shared?

note: my app is in the fintech space, the goal is to build an mvp and get the required certifications.

Thanks in advance!