I am not convinced that laws forbid church.
Your church may have shuttered but I don’t agree that they HAVE to.
I have not read your specific order so could be wrong.
My church is still open for PRIVATE prayer on an individual basis. Church SERVICES or any type of public gathering together has been completely suspended. No liturgical mass, prayer service, or holy communion of any kind.
If they can pack 'em in to wait in line to get booze and weed in Illinois, you'd think they could have SOME type of ability for people to receive the Eucharist. The Catholic Church has even had Presanctified communion for many centuries (this is usually done on Good Friday), where the communion has been concentrated by a priest IN ADVANCE, and he need not be present to distribute it among the people.
Though the fact there is no Communion available is probably more the fault of Catholic bishops than the Illinois state government, IMO. So you are essentially correct that they don't "have to" ban people from praying together or receiving holy communion.