USB C to USB C hub?

there are Amazon.com: Anker USB C Hub, PowerExpand 6-in-1 USB C PD Ethernet Hub with 65W Power Delivery, 4K HDMI, 1Gbps Ethernet, USB-C Data Port, 2 USB 3.0 Data Ports, for MacBook Pro, MacBook Air, iPad Pro, XPS, and More: Electronics

but it's rarely more than two

USB-C + USB-A 4 Port Mini Port Expansion Hub | Belkin

these have more than two though

Sitecom — CN-385 — USB-C Hub 4 Port

OWC Thunderbolt Hub for M1 and Intel Macs and Thunderbolt 4 PCs (macsales.com)

Thunderbolt 4 | USB4 | Element Hub | CalDigit – CalDigit

there are many Amazon.com: powered usb c hub

most seems also to have other usb or devices connectors though

Perhaps you are describing the HUB incorrectly. Are you looking for a particular Adapter or a HUB?

An adapter converts one port type to another. A HUB, on the other hand, connects to one port of your computer and then expands it into several other types of ports. What are your expectations?

Axel F.