Short list of commands for adding VLAN's to trusted zones:

firewall-cmd –zone=trusted –add-source=192.168.0.0/24
firewall-cmd –zone=trusted –add-source=10.0.0.0/24
firewall-cmd –zone=trusted –add-source=10.1.0.0/24
firewall-cmd –zone=trusted –add-source=10.2.0.0/24
firewall-cmd –zone=trusted –add-source=10.3.0.0/24
cat /etc/firewalld/zones/public.xml
firewall-cmd –runtime-to-permanent
cat /etc/firewalld/zones/public.xml

Result of this is:

cat /etc/firewalld/zones/trusted.xml
<?xml version="1.0" encoding="utf-8"?>
<zone target="ACCEPT">
  <short>Trusted</short>
  <description>All network connections are accepted.</description>
  <source address="192.168.0.0/24"/>
  <source address="10.0.0.0/24"/>
  <source address="10.1.0.0/24"/>
  <source address="10.2.0.0/24"/>
  <source address="10.3.0.0/24"/>
</zone>
 

Thx,