Same here, also with a Gigabyte AM4 mainboard, X470 AORUS GAMING 7 WIFI, with a Ryzen 2700X CPU. All physical network interfaces are affected, which in my case are all Intel (I211 onboard, WLAN 9260 onboard, and an I350-T2 card).
Drivers are current, BIOS is current. Removing the update brings the interfaces back, but tends to break the start menu instead ("Critical error"). The network problem reproduces reliably every time the update is installed.
With Intel drivers, the error code in Device Manager is 0xc00000e5/STATUS_INTERNAL_ERROR, with in-box drivers, 0xc0000001/STATUS_UNSUCCESSFUL.
--
Christian