Tousart got a red card, and they were lacking a man in midfield for 70 mins. Ndombele made several interceptions and tackles that game, but he was obviously told to contribute more offensively, so there were huge gaps behind him (that Tousart should originally have covered) and PSG scored goals on the counter. There`s no way you could have seen that game. Verratti didn`t take him out of the game at all.
Gueye turns 30 this year and Verratti is 4 years older. Ndidi, Lerma, Hendrix or Llorente isn`t close to Ndombele`s level at all. And Aouar is an attacking midfielder/left winger (played DM like twice)