for me, it’s pretty confusing in quite a few instances, but, just to give an example: if the striker shoots and the keeper saves it, but the striker taps in the rebound, how is xG counted? is it counted twice or just once? or, what if neither shot goes in?
In your example, there are two finishes and thus two cases of xG each of which is counted. It doesn’t matter for xG whether the shot actually ends up as a goal.