Joselu wants to impress Ancelotti as much as possible to get more chances to play. His goal with a bicycle kick in a friendly match recently was really worth watching honestly. He can surely find chances this season but not in the Champions League most probably. I mean they will sign a much better striker soon and Joselu's chance isn't that high as long as that new transfer can't play for a reason.
Joselu is on loan at Real Madrid as well so Ancelotti would use him as a second option most of the time. He must be aware of that already before coming here. I don't think he would mind this either because he can still win championships with this team until his loan period comes to an end.