To get wlan working via Wicked network, at first must make a file. An example wlan0

sudo nano /etc/sysconfig/network/ifcfg-wlan0

…. which contents is

BOOTPROTO='dhcp'
STARTMODE='auto'
WIRELESS_ESSID='network-name-here'
WIRELESS_AUTH_MODE='psk'
WIRELESS_WPA_PSK='network-password-here'

…. save, quit and restart network

Ctrl o
ctrl x

sudo systemctl disable NetworkManager

sudo systemctl enable wicked

sudo systemctl restart wickedd.service

Reboot if needed.

Read also:

https://tech.linuxman.co/linux/linux-desktop/configure-network-interface-in-wicked/