Pivpn encryption

[J4ME51]

Why does wireguard only use 128bit encryption and not 256Bit?
Unless I have misunderstood surely OpenVPN would be better

If you go for WireGuard, you don't get to choose: you will use a Curve25519 public key, which provides 128-bit security

[TinCanTech]

Elliptic curve cryptography is specifically designed to require less bits.

Edwards curves (ED25519, ED448) are, to my understanding, completely predefined ..

You have to learn a lot about cryptography before you understand.