for what it is worth this is how you “lsusb” in macOS:
$ ioreg -p IOUSB
+-o Root  <class IORegistryEntry, id 0x100000100, retain 36>
  +-o AppleT8112USBXHCI@01000000  <class AppleT8112USBXHCI, id 0x100000371, reg$
  | +-o Magic Keyboard@01100000  <class IOUSBHostDevice, id 0x100000d5a, regist$
  +-o AppleT8112USBXHCI@03000000  <class AppleT8112USBXHCI, id 0x1000003bb, reg$
  +-o AppleT8112USBXHCI@00000000  <class AppleT8112USBXHCI, id 0x1000003ca, reg$
  | +-o 4-Port USB 2.0 Hub@00100000  <class IOUSBHostDevice, id 0x100000a0e, re$
  | | +-o USB2.0 Hub             @00140000  <class IOUSBHostDevice, id 0x100000$
  | | +-o Rocksmith USB Guitar Adapter@00110000  <class IOUSBHostDevice, id 0x1$
  | +-o 4-Port USB 3.0 Hub@00200000  <class IOUSBHostDevice, id 0x100000a10, re$
  |   +-o RTL9210B-CG@00220000  <class IOUSBHostDevice, id 0x100000a43, registe$
  |   +-o USB3.0 Hub             @00240000  <class IOUSBHostDevice, id 0x100000$
  |     +-o USB3.0 Card Reader@00243000  <class IOUSBHostDevice, id 0x100000a71$
  +-o AppleT8112USBXHCI@02000000  <class AppleT8112USBXHCI, id 0x10000036e, reg$
  | +-o Scarlett 4i4 USB@02100000  <class IOUSBHostDevice, id 0x100000a56, regi$
  +-o AppleEmbeddedUSBXHCIASMedia3142@08000000  <class AppleEmbeddedUSBXHCIASMe$
    +-o USB Receiver@08300000  <class IOUSBHostDevice, id 0x100000a2f, register$
    +-o YubiKey FIDO+CCID@08400000  <class IOUSBHostDevice, id 0x100000a37, reg$
ioreg is a wrapper utility for doing queries from https://developer.apple.com/documentation/iokit
just learned this and now i’ll probably remember it too after writing this ;-)
Just learned how to update OVMF_VARS.fd offline before running QEMU:
 virt-fw-vars \
    --input "$OUTPUT/OVMF_VARS.fd" \
    --output "$OUTPUT/OVMF_VARS.fd" \
    --append-boot-filepath /EFI/debian/grubx64.efi
E.g., in Debian the package containing virt-fw-vars  is python3-virt-firmware but it is also available from PIP: https://pypi.org/project/virt-firmware/