Linux Hint published a tutorial about how to list all rules in Iptables.
Linux Iptables List All Rules
Iptables is a gateway that is crucial for many Linux platforms' network securities. Before doing anything, make sure your system is up to date and upgraded. If not, try the apt “update” and “upgrade” commands on the shell. Initially, let's glance at how to generate a rule list. The operational iptables rules may be seen in two distinct ways: in tabular form or a list of rule parameters.
