Yes, M5+ support is currently an active focus of Aurora Silicon (an AI-enabled fork of Asahi Linux), development is in progress as we speak:

https://github.com/aurora-silicon/linux/discussions/142 https://aurorasilicon.org/devices/?device=j873s https://x.com/JoshuaSWarren/status/2118331083330629847

It is coming along impressively fast, one of the developers has a goal "full support on the M5 Max by Thanksgiving here in the US (November 26th)." https://x.com/JoshuaSWarren/status/2118375325805547666