Is there any requirements to filter using Ansible facts from AWX?

For example:

curl -skL -u "admin:Ansible123!" "https://awx.example.com/api/v2/hosts/?host_filter=ansible_facts__ansible_system=Linux"

Will show 0 hosts:

{"count":0,"next":null,"previous":null,"results":[]}

While I have 2 CentOS nodes managed by my current AWX.

I also noticed that facts are empty here “Inventory”–>”Hosts”–>”Facts”

I’m using AWX on K3S.

Is there a possible reason why I can’t have my node facts or filter based on facts?