I use Surfshark as a VPN provider and their WireGuard config require DNS settings and an address space on the interface, neither of which can be added through the gui - I'm sure the underlying implementation supports these.

Would it be possible to add these fields or to provide a plain text box instead in which one could type the complete config?

[Interface]
Address = 10.14.0.2/16
PrivateKey = ****

DNS = 162.252.172.57, 149.154.159.92

I'm configuring my ER605v2 through my OC200v1, but the issue is the same in standalone: