You can read more about that on 21.4. eBPF and XDP — Suricata 7.0.0-rc3-dev documentation and 21.6. AF_XDP — Suricata 7.0.0-rc3-dev documentation also the suricata.yaml shipped has the section with some comments.
To start it in that mode you need to pass --af-xdp when you run Suricata.