But they also fund JetBrains, Jetpack Compose, and KMP. It feels like the company threw their support behind Kotlin a long while ago on mobile, but internal struggles keep the others limping along. Compose UI tooling no longer requires viewing on device.
Android used to be its own kingdom separate from rest of Google. And maybe still is.
You're thinking of Google as a single top down company. It isn't. Think of it as an anarchy of warlords where each pulls the strings and management doesn't really know what's going on.
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.
Only because it was cheaper to migrate Android to Kotlin instead of Dart. JetBrains needs Google more than Google needs JetBrains.