Big Sur native usb3.0 pcie cards - are there any?
PCI-E to USB 3.2 Type Card Gen 2 Adapter with 20 Gbps Bandwidth 7
Thunderbolt 3 to USB 3.1 Host Controller - Thunderbolt Hubs
USB 3.0 7-Port Hub with 2 BC 1.2 Charging Ports and 36W Power
Best Thunderbolt 4 and USB4 hubs and docking stations - Tech Advisor
5 Ports USB Pcie Hub Adapter 3xusb3.2 20gbps Splitter für Desktop
USB Hubs Stone Group
5-in-1 Thunderbolt™ 4 Mini Docking Station with 85W Power Delivery
Hp, Apple, Dell, Lenovo, Asus, Acer, Toshiba, Sony Accessories
USB-C to 4-Port USB 3.0 Hub with PD Charging - 3A/1C
Multi-Port USB Hubs & Adapters, USB Port Hubs
PCI-E USB 3.2 Card Gen 5 Ports PCI Card with 20 Gbps Bandwidth