Using the benchmark game to judge the performance of regex engines for a specific task for anything other than what the benchmark game is doing is a serious mistake.

And I say this as the person who wrote the only non-PCRE regex engine that appears in the top 20 entries of the regex-redux benchmark.

Besides, if people want to use PCRE2 from Rust, then it's as simple as using a crate (which I also wrote): https://docs.rs/pcre2