The documentation for installing Ansible Lightspeed Intelligent Assistant has a section for the inventory variables which are required to enable the chatbot, MCP integrations, and coding assistant. The documentation is missing the requirement to define a host for ansiblelightspeed (example below):

[ansiblelightspeed]
aap.example.com 

If you don't define a host in the ansiblelightspeed group, then the installation of lightspeed will be skipped by the installer.