Hello,
Apart from manual install, there is two other ways depending your infrastructure apart from manual way:
1) if you have a proxy for internet then configure proxy on rhel8 ansible node and then perform install via pip. If you don't have proxy already then you could configure squid default proxy in some other linux flavored server.
2) create a linux/CentOS server (maybe on VMware workstation) with two network interfaces one of which could connect to internet and then
2A) if you can access rhel8 Ansible server from your local laptop then bridge the another network connection to your local laptop network adapter which has reachability to the Ansible node.
OR - in this setup reachability is not working for you then try for following 2B
2B) bridge the second network adapter of workstation CentOS/Linux vm with adapter of Ansible node.
OR -
If this is also not possible then just deploy the CentOS vm and assign two network interface one of which connects to internet and another nic in same subnet as your rhel8 Ansible.
Once you have both reachability Ansible server and internet, from rhel/centos vm you deployed then
3) make this custom vm as repository for rhel8 Ansible vm and then download required packages or dependency on customer vm so that you could trigger installation of these packages on rhel8 Ansible vm.
Hope this help🙂
Thanks & Regards,
Piyush