Hello,
To import default routes, you need to run both the default-route imported and import-route commands. If you run only the import-route command, default routes cannot be imported. In addition, the default-route imported command is used to import only the default routes that exist in the local routing table.
Except for the default-rout-imported command, you can also use the network 0.0.0.0 command to import the default route.
#
ipv4-family vpn-instance xxxx
import-route direct
network 0.0.0.0
#