[mithro]

Things like my https://wafer.space ($7k USD), TinyTapeout.com (<$200 USD) and ChipFoundry.io (~$15k USD) are making it much cheaper to do IC design.

There are a huge number of designs from Tiny Tapeout which are all public - see https://tinytapeout.com/runs/

The designs are still more in the MCU size, but you have to start somewhere!

The Google open MPW program also had 10 runs with 40 projects published at http://foss-eda-tools.googlesource.com/third_party/shuttle/ -- All the submissions had to be open source and there were 1000+ of those. I did try pitching to multiple Google Research groups that continuing the open MPW funding would grow the available designs which have been manufactured and that was useful for AI training but didn't get any bites.

The now defunct Efabless also ran a number of challenges in this space which got pretty good results, see https://efabless.com/challenges