I know you're right, but nowadays, everybody calls them hubs.
But if you really need the hub you describe, here's one that I think conforms to what you describe: https://www.coolgear.com/product/usb-31-typec-4-port-hub-or-...
For a little bit more, you can have 6 USB-C ports: https://www.coolgear.com/product/usb-3-1-dual-type-usb-c-a-8...