TpLink ER605 V2 - kmod-usb3 installed by default?

Hello, I'm using menuconfig to prepare an OpenWRT image for the TP-Link ER605 V2.

I've noticed that the default profile for this device is installing kmod-usb3, but the router only has one USB2 port. Is there any explanation for this?

The only thing I can think of is that the router has a USB 3 controller but the port is USB 2, but that doesn't make much sense...

Should I be installing kmod-usb2 and removing kmod-usb3, or install both?

It seems our 605v2 has an USB 3 controller.

root@ER605v2:~# apk info | grep -i usb
kmod-usb-common
kmod-usb-core
kmod-usb-hid
kmod-usb-storage
kmod-usb-uhci
kmod-usb-xhci-hcd
kmod-usb-xhci-mtk
kmod-usb3
libusb-1.0-0
libusb-compat4
root@ER605v2:~# dmesg | grep -i usb
[    6.550602] usbcore: registered new interface driver usbfs
[    6.556399] usbcore: registered new interface driver hub
[    6.562047] usbcore: registered new device driver usb
[    6.638204] usbcore: registered new interface driver usb-storage
[    6.640170] xhci-mtk 1e1c0000.xhci: new USB bus registered, assigned bus number 1
[    6.684365] xhci-mtk 1e1c0000.xhci: new USB bus registered, assigned bus number 2
[    6.691871] xhci-mtk 1e1c0000.xhci: Host supports USB 3.0 SuperSpeed
[    6.699659] hub 1-0:1.0: USB hub found
[    6.709001] usb usb2: We don't know the algorithms for LPM for this host, disabling LPM.
[    6.718404] hub 2-0:1.0: USB hub found
[   18.398417] usbcore: registered new interface driver usbhid
[   18.404142] usbhid: USB HID core driver
root@ER605v2:~#