I would like to do a removal of material from the shape of the edge of the sketch on the side but it doesn't work, I would like to create a vault on the top but that there is the removal of material on the 2 sides too.... I don't know if I'm making myself understood...
It's normal not to be able to do it, you use the extrusion function which is a removal of material in a straight line (to simplify) except you want to follow a curve.
Take your drawing as on the image attached in your 1st post (because your parts are different there) and use the "swept material removal" function using the side curve as a guide.
There is also the method by cutting with a surface but if you are a beginner we will avoid it.
Or you can also create the part via bossing/smoothed base, but here again it requires a minimum of knowledge.
Save your piece in a corner and try to remake it with the other methods.
In any case, pay close attention to the options of each function such as the profile follow-up or stay at normal in relation to the guide curve depending on what you are looking to achieve.