Double vpn

Hello, how can I achieve effect of double vpn? Vpn over vpn. Device: E750v2 (Wireguard)
Thanks

What do you mean by Double VPN?

You can always run a VPN on a client while connected to a router who does VPN as well. But you can't run VPN over multiple hops on the router itself, no.

I saw somewhere in forum about vpn cascading, isn’t that ?

Not really. VPN Cascading is accessing your router from abroad and then tunnel through another VPN, see VPN Cascading - GL.iNet Router Docs 4

Oh I’m sad right now I really care to achieve this, is there any plugin maybe?

No way without diving deep into OpenWrt itself, I am sorry.