Hi @null and @Seyerjo - thanks for using Local!
The notice on the WordPress diagnostics section is not related to a specific version of Local; instead, it has to do with an upgrade to WordPress itself. WordPress started recommending the intl extension for PHP with WordPress version 5.9, I believe. The notice is a suggestion rather than an error.
That said, it is something we intend to add. I am not familiar with an easy way to compile this yourself on Linux. I am going to work on merging related threads like this into a feature request so that the community can vote on it, and I will link this thread to our issue in the development team backlog. I’m sorry I don’t have a better answer in the meantime.
Thanks,
Austin