3 indie games is not exactly a lot. 3 indie games is what's launched on Steam any given 10 minutes. If you mean huge indie games, Steam gets about one or more of those a day.

And it seems like the Steamworld developer is quite serious about porting games to Stadia, since 4 games out of the 10 you mentioned are all related to Steamworld in some way. That doesn't strike me as a healthy indie market if it's so heavily sustained by one developer.

And announcing 4 more indie titles coming soon doesn't leave me with any confidence. It's not much.