Ancelotti is indeed trying something new with Bellingham on the field. That 4-4-2 that looks almost like a 4-1-2-1-2 with Tchouaméni as DM and Bellingham as AM or SS.
With Joselu on the field (a clear 9) seems to revert to last year's 4-3-3, with Bellingham perhaps as a Mezzala.