Builtin speaker support is still a work in progress. It works if you know what you are doing and are not afraid to damage your speakers if you make a mistake. There's been progress on this though, so I expect this to be resolved sooner than later.
There's no builtin speakers in the author's mac studio though, so I'll give them a pass for this one.
Bluetooth and wifi both work, but their drivers are still buggy. I see a lot of errors in dmseg from these drivers and occasionally things stop working and require a reboot to fix.
GPU acceleration works, but there is still a lot of work to do on that driver.
External displays over the thunderbolt ports don't work yet.
Other things that don't work on the laptops: webcam, touch-id / Secure Enclave, some miscellaneous software.
Don't get me wrong, I've been able to daily drive linux only on my m2 air since August. I love the hardware and the current state of Asahi meets my needs. And its been steadily improving over the course of time. But its far from "work[ing] perfectly" yet.