Hi so my question would be that why didn’t apple give IPhone 6 the IOS 13 and up? I have an IPhone 6 but I can’t use the apps now that I’ve been using so far.
IOS 13
The most likely reason was that iPhone 6 had not the capability to run some iOS 13 functions, notably the processor capability. Performance (and user experience) would have been too poor. You can still update to iOS 12.5.