Proposal

Add factories on ElevatedButton for FilledButton and FilledTonalButton or add factories to an existing button to respect m3 guidelines. I understand those were not added because then what about when the background needs to be an error background ? tertiary ? etc. I believe however that a few factories could help here.

relevant: #99022

use case

Going from a design using the material 3 kit on Figma to flutter should be seamless.