Simone Inzaghi will not leave Inter for United. There is currently no chance of United signing Simone Inzaghi. It is possible that United will stick with Ten Hag until they find a suitable replacement. Regarding Giggs, after retiring from the Wales national team, he did talk about his desire to coach again soon. It should be considered, but I think the chances are also small. Now what United management is thinking about is transforming their team to be better instantly. The results must be seen immediately in a few matches, they will look for a more experienced coach.
Manchester united needs a lot of works by any coach that would be replaced if Ten Haag is sacked and for Simone Inzaghi to leave Inter Milan and coach Manchester united seems to be impossible for now because he is doing perfectly well as Inter Milan's coach so if he moves to coach Manchester united now, it will be for him to start some reshuffling in the squad in order to make things right. As for Giggs i don't think for him to consider coaching Manchester united will be a good decision. I just feel that the club's management may still continue with Eric Ten Haag if they don't get a suitable coach to manage the team. Honestly Manchester united needs to get better because the club have been spending so much on players but nothing to show for yet so they really needs a coach that can make good use of this players.