@massimope this is a really old thread, and not about internet access.. But about policy routing where was forcing traffic out a specific gateway, ie the vpn..
https://docs.netgate.com/pfsense/en/latest/multiwan/policy-route.html#bypassing-policy-routing
If your trying to get multiple vlans to use your vpn client connection.. That would be most likely related to your outbound nat, not including your vlans networks..
Vs jumping on a 3 year old thread.. I would suggest you start your own with your own details of what exactly your wanting to accomplish.. Are you policy routing out specific to your vpn client connection, are you wanting to default route everything out the vpn?
What is your outbound nat settings? etc..