What!?!?
No.
This all goes in /etc/config/network
This goes in /etc/config/dhcp
This goes in /etc/config/firewall
config zone
option name 'wan'
option output 'ACCEPT'
option masq '1'
option mtu_fix '1'
option input 'DROP'
option forward 'DROP'
list network 'wan'
list network 'wiro' #<---add
Keep the wiro WG network config [obviously].
Done. Nothing more, nothing less. Please let us know if this works.
Not sure why you edited this, though.