Hi user! Router is not support VPN, I think you can try another way as below:
Login to your Router Administrator Console:
1. Connect to the internet and launch the web browser on your computer.
2. You need to know your router’s local IP address to access the administrator login page.
3. In most cases, the local IP address is 192.168.1.1 or 192.168.0.1; however, we do have a comprehensive list handy. You can find it here.
4. On the login page, you are prompted to enter the Router’s username and password.
Configure the L2TP Connection:
1. Go into your routers administration panel.
2. Open VPN in the left-side menu, and expand the L2TP section.
3 Enter this configuration:
Enable L2TP LAC: Checked
LNS address: Enter a SaferVPN server address. You can find our server addresses here
Host name: Anything you want, for ex:- SaferVPN or SaferVPN L2TP etc.
Tunnel password: Leave empty
Hello Interval (seconds): 60
PPP username: SaferVPN username
PPP password: SaferVPN password
Connection mode: Auto
4. Click Save
https://support.safervpn.com/hc/en-us/articles/360035428634-Manual-L2TP-Setup-for-Huawei-router