The tcpreplay command input arguments require to specify the network interface and it conveniently advertises an option --listnics to list all the network interfaces on your machine. An example usage is displayed in the screenshot below.
$ sudo tcpreplay --listnics
However, using any of the listed interfaces will result in an error when attempting to playback a pcap file, as shown below.
$ sudo tcpreplay --intf1 bluetooth0 *.pcap
After some research, I found the ip command with the link option that lists the network interfaces correctly.
$ ip link
Now plugging in the correct interface name into the tcpreplay command, my network packets are successfully replayed and broadcasted.
$ sudo tcpreplay --intf1 enp0s25 *.pcap