enlarge frames of a clip

Hello,
edit: actually, the animation has different numbers compared to blender but there is the entire animation, so it’s ok.

in Blender, the timeline is 0 - 58
with 3 animations with a different name in Action editor.

When I import the fbx in Unity, the number of frames are different, for example an animation clip would be 14 - 58 and in Unity it says “14 - 18”

When I try to modify the beginning or the end of the clip, it stays in between the first numbers by default.

How could I fix that?

Thanks

Is it telling you the number of frames are different, or keyframes?