I just recently posted exactly the same issue here: VPN no route to internet I will gladly join your search for a solution here.
1 green nic, vpn works, cant get out of the NS.
@filippo_carletti suggested to check “systemctl status shorewall”
Looks nominal. @JOduMonT could you check that on your end, too?
The last days I could not ping google. Today all of a sudden without any changes that seems to work. Still can not load any websites. Maybe DNS is not working?