All Thunderbolt 4 hubs/docks that currently exist only have a max 3 downstream Thunderbolt ports. OWC makes a Thunderbolt 4 hub (includes a USB-A port) and a dock. CalDigit has a Thunderbolt 4 hub (includes 4 USB-A ports). Sonnet, Kensington, Razer, etc. all have similar Thunderbolt 4 docks as the OWC. Zikko has a Thunderbolt 4 hub similar to the OWC.
Maybe you can chain a couple hubs together to get 5 ports but there might be issues with that.
I suppose one could make a Thunderbolt hub with 7 downstream ports by putting 3 Thunderbolt 3 add-in cards in something like a Sonnet Echo Express SE-IIIe but there's no software to make that work yet.