I personally would like for it to pick up some ideas from Svelte.
I think Dart and Flutter are very overlooked. The language has completely changed since its release, its statically typed, has null safety, enums, and pattern matching, and is very simple and easy to read. It has fast compilation and a ui framework with hot reload. It's as fast as Js on v8 while using less memory and has the overlooked feature of having very fast, almost 0 overhead, ffi.
I think the importance of good ffi is underrated for these ui languages. For reference, everyone that's using electron has to run two node processes doing ipc over a websocket connection. That's going to waste an absurd number of cpu cycles and memory when you are passing messages around when your app is basically a ui for a cli.
Flutter made a lot of sense during the Oracle lawsuit when Google needed a way to show Oracle that it can pivot from Java. Now it no longer makes sense but the inertia is too deep.
My guess is that flutter is sold internally through the Huawei support as a leg within China.
At some point there's just not much exciting new stuff to add. Flutter is a nice stable platform, I'd highly recommend it.
And that new rendering engine is also why apps like Immich are unable to show HDR photos. Apple & Google both pushed broad support for that a couple years ago, with things like Ultra HDR and subsequently ISO 21496-1.
Meanwhile Flutter still doesn't really have wide gamut support https://github.com/flutter/flutter/issues/189155
Of course they need to prioritize where to spend resources, like any project, but Flutter also doesn't seem to be on any critical path for fancy headlining new features, either.
I understand it's limitations vs native apps, but there's quite a few cases where it really doesn't matter.
The biggest one for me is always the fear it will be abandoned. Pretty much goes for any cross platform app framework though.
So they're probably investing in it enough for basic maintenance, but don't really care about evolving the language.
Killing Flutter would not promote a manager. For now, of course.