You should clarify what you mean with indie devs.
A game developer not working for a "major" studio is still a professional and will want to live from that work. So any experimantal stuff will have been tested on a small scale at least, before producing a complete game. A small and therefore indie game studio cannot afford to spend months or years developing an experimental game for it to turn out to not have an audience.
As for hobby devs, you will see all sorts of bold and crazy ideas. Some of them are even successful and turn a hobby into a profession.
If you search such games, you might find more of such bold ideas under https://itch.io/games/prototypes