Swift extension - Constrained extension must be declared on the unspecialized generic type 'Array'

I assume you mean

extension MyModels: NetworkModel {

has an error? You seem to have missed an s there.

The error is basically telling you to do this:

extension Array : NetworkModel where Element == MyModel {
    static var path = "the/endpoint/path"
}

You can't simply make an extension of [MyModel].