Impossible style mapping in custom Word Export

Hello
when i'm exporting map to word, I can't find a way to properly map topics level to style in a word document.

I tried "map style", custom word template with dotx and dot template,

it's all the same :
Everything is in normal style, indented but not linked with the table of contents.

The only thing that I found: if i'm using Document formating/Custome numbering/Indent until/No indenting, then every topics appears in the table of contents (but no style mapped still)

Is there some issues of that kind? Is there specific XML config in office that may be usefull?

Thank you for reading