Debian 9.7 not outputting iptables chains?

Question

Debian

Switched to Debian 9.7, registered chains in iptables, but I can't see

# lsb_release -a
No LSB modules are available.
Distributor ID: Debian
Description:    Debian GNU/Linux 9.7 (stretch)
Release:        9.7
Codename:       stretch

# iptables -L
Chain INPUT (policy ACCEPT)
target     prot opt source               destination

Chain FORWARD (policy DROP)
target     prot opt source               destination
ACCEPT     all  --  anywhere             anywhere
ACCEPT     all  --  anywhere             anywhere

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination

Answer 1

iptables-save