hi,
Did you connected your iphone to B1300? If so, you should enable forwarding from wireguard to lan with commands below, which can refer to No internet access via Brume2 - #15 by glineter.
# enable wireguard server to LAN forwarding
uci set firewall.wgserver2lan=forwarding
uci set firewall.wgserver2lan.src='wgserver'
uci set firewall.wgserver2lan.dest='lan'
uci set firewall.wgserver2lan.enabled='1'
# set LAN masquerading
uci set firewall.@zone[0].masq='1'
uci set firewall.@zone[0].masq6='1'
uci commit firewall
/etc/init.d/firewall reload