M1: https://images.anandtech.com/doci/16252/latency-m1_575px.png
Zen3: https://images.anandtech.com/doci/16214/lat-5950.png
If anything the M1's ram has _higher_ latency than the Zen3.
(Can't reply to the sibling comment but Intel's numbers are even better: https://images.anandtech.com/doci/16214/lat-10900.png)