I am not sure what this entry is. But we do not use that format since we use UKIs.
If you want to add kernel parameters you will need to add an addon UKI. You can make this with ukify. Then put it in /loader/addons. You will need to sign it with your MOK if you use secure boot. You can find this information in the man page of systemd-stub. Look for “addon”.
1 Like