Codeigniter 4 in intranet

i don't understand why is separate to codeigniter4 , i want use a framework in my company network , with ci3 i create an application that work fine in this intranet . Can i do the same with ci4 on the same intranet with the other application ? otherwise i have to choose another framework (ps the server is a windows server)

 ok then if you are using Ci3 for an INtranet then with CI4  php >= 7.3 then it will work even better :^)