Mandate is a strong word, but this month: https://news.ycombinator.com/item?id=42013379

"For existing products that are written in memory-unsafe languages, not having a published memory safety roadmap by Jan. 1, 2026, is dangerous and significantly elevates risk to national security, national economic security, and national public health and safety,"

Obviously they can't ban a language. But if you work in the public sector, are a defense contractor, or otherwise have companies which do or want to do work for the government (which yes, includes most FAANGs), this will influence quite a bit of decisions in the US tech industry.