Hi,
after configuring the VM in HA and attempting to start it, please share the output of ha-manager status -v and qm config <ID> --current with the ID of your VM. Also make sure to meet the requirements for HA: https://pve.proxmox.com/pve-docs/chapter-ha-manager.html#_requirements
Thanks for sharing the solution! You can edit the thread and select the [SOLVED] prefix, so others will find solutions more quickly.
Can you also share the error the service ran into journalctl -b -u pve-ha-lrm.service? Or was it just not started for some reason? Depending on what it was, it might be possible/worth improving.