The upcoming Linux 7.2 mainline kernel is expected to be able to boot on Apple M3 devices including the M3-powered iMac and MacBook products. But before getting too excited it's still a long ways to go before it will actually be useful for any Apple M3 daily usage under Linux with the overall support at this stage still being very limited for these 2~3 year old Apple Macs...
Source: Phoronix — read the full report at the original publisher.