Android dev here. If they want the developer's attention they need to provide tools. Flutter is an alternative, compose desktop would be another, it intellij makes it run on kotlin native. We don't want to learn gtkSomething or using low level languages like c.
I'd they don't than Linux on phones to be mainstream, then keep doing what they are doing.
Also they need a big player like Xiaomi or Samsung to make a Linux edition of their flagships. People will be willing to pay big money for a super fast Linux phone.
True, it won't be easy, but better than sending people there. Spend some billions and in 10 years bring some robots, and explore the planet without risking any human life.