Why can't I pass a Protocol.Type to a generic T.Type parameter?

I was working with Swinject and a problem is bugging me. I have been stuck one this for almost an entire day. I suspect this is due to Swift being a statictly typed language but I'm not entirely sure.

I summarized my problem in this playground

protocol Protocol {}

class Class: Protocol {}

let test: Protocol.Type = Class.self

func printType(confromingClassType: Protocol.Type) {
    print(confromingClassType)
}

func printType<Service>(serviceType: Service.Type) {
    print(serviceType)
}

print(Class.self) // "Class"
printType(serviceType: Class.self) // "Class"
print(test) // "Class"
printType(confromingClassType: test) // "Class"

printType(serviceType: test) // "note: expected an argument list of type '(serviceType: Service.Type)'"

I tried different solutions like test.self or type(of: test) but none of them work.

So I guess I can't call a function with a generic parameter provided as a variable ?