Powerautomate get folder by url
/_api/web/GetFolderByServerRelativeUrl('@{variables('WebserverRelativeUrl')}/@{variables('DoclibUrl')}/Fiche_@{variables('FicheId')}')
Verify status (exists = 200, does not exists = 404)
@{outputs('HttpGetFolder')['statusCode']}
Create folder
/_api/web/folders/add('@{variables('DoclibUrl')}/Fiche_@{variables('FicheId')}')