Not clear in documentation which neutron-api options are for "new style" deployment ovn and which one is only for neutron-gateway which.

Especially when you start with neutron and OVN is very unclear which options in neutron-api are strict for neutron-gateway and which will affect OVN deployments as well, e.g.
      #enable-l3ha: true
      #max-l3-agents-per-router: 2
      #min-l3-agents-per-router: 2
      #allow-automatic-l3agent-failover: true
      #allow-automatic-dhcp-failover: true
      #dhcp-agents-per-network: 2

In fact, you can't even query router and DHCP agents using neutron API anymore, commands like:
neutron l3-agent-list-hosting-router
OpenStack network agent list

won't show dhcp or l3 agents, which I think is correct as OVN is doing it but it's confusing in the guide what is applicable to which scenario, especially when OVN is now defaulted going forward.