That's how it is!
Adobe programs usually have an option when exporting (I can't quite remember the literal definition), which says: "Respect cmyk numbers.
Namely. Profiles are useful for conversions from one model to another, and for visualizations or simulations. But the control of cmyk inks is very important, because it is assumed that certain percentages of ink will give a different result on different types of paper, which may not be acceptable for a client, is that if they have given you a job with 100% cyan, print shows 80-10 black. These are all ink targets that must be respected in most cases. The same does not happen if they give you an RGB file.
At first I ran into that "numbers" problem in Affinity. Now I have it under control with those steps that I have tried to explain. It is important that it is exported with the ICC with which it is working, and as in photoshop, I prefer to assign a profile to a conversion because it is a non-destructive definition.
Sorry for the mistakes, I have traced it with google.
Dejo la versi贸n original: