Here’s the play I came up with, and I listed the inventory in the order that I want within the group. I would like my config file to be in the following order:

Host node1 10.0.0.30
  HostName 10.0.0.30
  ...

Host node2 10.0.0.31
  HostName 10.0.0.30
  ...

Host node3 10.0.0.32
  HostName 10.0.0.30
  ...

My current attempt at achieving this

I swear it worked once and then just stopped after I tweaked it a little more…

- name: Generate SSH config sequentially by LAN IP
      delegate_to: localhost
      community.general.ssh_config:
        ssh_config_file: "{{ lookup('env', 'HOME') }}/.ssh/config"
        state: present
        host: "{{ item.inventory_hostname }}"
        hostname: "{{ item.ansible_host }}"
        remote_user: "{{ item.ansible_user }}"
        port: "{{ item.hostport | default(22) }}"
        identity_file: "{{ item.ssh_privatekey }}"
      loop: "{{ play_hosts | map('extract', hostvars) | sort(attribute='ansible_host') }}"