Commands for displaying firewall rule information do not show rule numbers in completion — their completion if always empty.
vyos@vyos# show firewall ipv4 { name WAN-IN { rule 10 { action accept destination { port 80 } protocol tcp } } } [edit] vyos@vyos# run show firewall ipv4 name WAN-IN rule <TAB> Possible completions: <text> Show summary of IPv4 custom firewall ruleset [edit] vyos@vyos# run show firewall ipv4 name WAN-IN rule