No hosts matched about ansible-os-autoinstall HOT 2 CLOSED

I'm a bit confused about your hosts file configuration because what I know is that the inventory file should contain the IP or the hostname of the targeted machine

That's correct. The [boot] group should contain the host where kickstart files deployed.
The rest sections is the groups of hosts by distribution type and the hosts is not supposed to be exists at the time the playbook running - but used to create kickstart files with given attributes.

please provide your inventory(hosts) file - and I'll help you with the error you get

from ansible-os-autoinstall.

Error "no host matched"
Seems you had an incorrect inventory configuration as this is error actually raised by ansible.

from ansible-os-autoinstall.