Normal:

wicked show-config | wicked2nm migrate --dry-run -
wicked show-config > wicked.xml
wicked2nm migrate wicked.xml

Oder:

# NetworkManager-config-server is required as otherwise NM will immediately add connections for all interfaces, resulting in duplicates.
# NetworkManager-config-server can be removed after the migration is done.
zypper in wicked2nm NetworkManager NetworkManager-config-server
# If NetworkManager-config-server is not available you can also manually add the drop-in configuration.
echo -e "[main]\nno-auto-default=*" > /etc/NetworkManager/conf.d/10-server.conf

# You can test beforehand whether there are errors or warnings.
wicked show-config | wicked2nm migrate --dry-run -

# WARNING: Run this as root, wicked will shut down the interfaces and they will only come up again once the migration is done.
# This oneliner shuts down wicked, starts NM and runs the migration, if anything went wrong it starts wicked again.
systemctl disable --now wicked \
    && (systemctl enable --now NetworkManager && wicked show-config | wicked2nm migrate --continue-migration --activate-connections -) \
    || (systemctl disable --now NetworkManager; systemctl enable --now wicked)

Quelle: https://github.com/openSUSE/wicked2nm