The stepped shed roof is the latest design? Here I have a suggestion. https://www.hausbau-forum.de/threads/efh-am-suedhang-mit-ug-eg-150-160qm.36890/page-5 Please post the latest plan.
Regarding the question: it is a basement if the lower floor on average does not protrude more than 1.40 meters above the ground (approximately your quote) However, this cannot be seen from your section, as the side walls of the lower floor are not visible, so it is unclear how much the floor protrudes. The sides must be largely covered by soil.