Enable usb ports Dual-Gigabit-Ethernet-Carrier-Board-for-Raspberry-Pi-CM4

Hi

I’m trying to enable the two usb3 ports on the carrier board which are disabled by default for RPI CM4 but cant get it to work. I’m have changed the config.txt file in the /boot directory and addedthe line dtoverlay=dwc2,dr_mode=host in the end of the file but the two ports are not enabled after reboot or am I missing something? i followed the instruction Dual Gigabit Ethernet Carrier Board for Raspberry Pi CM4 - Seeed Wiki
the command lsblk gives me following:
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
mmcblk0 179:0 0 7.3G 0 disk
├─mmcblk0p1 179:1 0 256M 0 part /boot
└─mmcblk0p2 179:2 0 7G 0 part /
mmcblk0boot0 179:32 0 4M 1 disk
mmcblk0boot1 179:64 0 4M 1 disk