If you build packages yourself, one can either include debug info, or generate a split package that includes debug info.

The piece that may still be missing is the inclusion of source code in debug packages, which is necessary to get any context for a debug session (it is not sufficient to seek out and clone random git repos because of versioning & patching differences).

But ideally, there would be a `-debug` package for every package in arch's repos, and one would not need to build them manually when debug symbols are needed. Arch does not have this.