This is 100% correct. The parent of the parent is confused (or is just using terminology incorrectly) as are the current siblings to my comment.
One post claims pointers carry length information so that free works. This has nothing to do with pointers, it has to do with the implementation of malloc and friends. It's only a promise of a successful malloc that you can free, nothing to do with the pointer other than it was returned by malloc. Pointers can point to all sorts of things, the only information they intrinsically have are the type of the object they point to and its address.
Two posts claim a function can return an array of bytes. This is impossible in C. You can't return an array of bytes. You can return a pointer that might point into a continuous sequence of bytes. You could also return a struct whose member is an array, but that's rarely done. When you return (or pass) what looks like an array syntactically, it is converted to a pointer to its first element.
Arrays, on the other hand, always carry length information via the sizeof operator. A special hand waving case would be you could define a pointer to an array (not a pointer to the first element of an array), so in effect the length is contained within the pointer type. E.g. char (*foo)[42] declared foo as a pointer to an array of char with length 42.