[strix_varius]

The fact that they tried other engines seems to imply that non Flutter options were... Options.

If literally the only option was an embedded flutter view, then there was never more than one viable solution and looking into unity etc was wasted effort.

[Aurornis]

It’s possible to integrate other things into Flutter.

However, it’s not easy. I think their options were either a popular mainstream library or a custom solution, not investing into something more obscure and less popular.