TBH I think Information Systems Engineering and Computer Engineering can just eat software engineers lunch at this point. the entire need for a separate engineering discipline on software was for low level coding. Custom hardware chips are easier to make for simple things and not a lot of need in low level coding anymore for more complex things means the focus is shifting back to either hardware choices or higher level system management
I'd argue the only places left you really need low level coding fall under computer science. If you are a computer or systems engineer who needs to work with a lot of code then youll benefit from having exposure to computer science, but an actual engineering discipline for just software seems silly now. Not to mention pretty much all engineers at this point are configuring software tools on their own to some degree
I think it's similar to how there used to be horse doctors as a separate profession from vets when horses were much more prominent in everyday life, but now they are all vets again and some of them specialize in horses