My understanding of the ruling is that the federal court said the Illinois state legislature must enact a “shall-issue” law withing 180 days.
I haven’t read the details, but my understanding was they were going to issue an injunction to stop the enforcement of the concealed carry prohibitions in the law, but delayed the effective date of the injunction for 180 days to allow the legislature to pass a constitutional law, if they can.
If they choose not to, the law on the books now is not enforceable because unconstitutional.
They are not trying to force the legislature to act, as they cannot do so legally, but they are simply giving them time to correct the situation. I need to read the details of the decision and have not had time.