I think you'll be hard pressed to find any company using open source tools to design a business-critical chip for a foundry that gives any information without an NDA.
AFAIK Google doesn't have a open-source ASIC design for OpenTitan, and WD doesn't have an open-source ASIC design for SweRV.
there are a lot of interesting initiatives, but in the semiconductor industry open source tooling and processes are only a tiny niche that a few companies are playing around with.