I'm successfully running Emacs natively on M1 using the Yamamoto fork. It just needs to be installed via the formula on Homebrew currently rather than the cask.

https://github.com/railwaycat/homebrew-emacsmacport/issues/2...

Haven't run any benchmarks yet, but general usage is snappier and startup time is around twice as fast as a gccemacs build running on a 2020 Intel MBA.