nixCraft published a tutorial about adding the network bridge (br0) with nmcli command in CentOS 8.

CentOS 8 add network bridge (br0) with nmcli command

Explains how to configure CentOS 8 server and add network bridge (br0) with the nmcli command. Useful to create a Linux network bridge on CentOS 8 for KVM.

CentOS 8 add network bridge (br0) with nmcli command - nixCraft