His lack of involvement is quite worrying, especially as ten Hag said he wants him to play deeper. However, 17 passes in 84 minutes suggests this is a player who, as I mentioned before, isn't getting on the ball. To put this into perspective, Erisken, who came on in the 65th minute, made he same number of passes today.
At the moment, I'm just not sure what role ten Hag is asking him to play, but going forward, I think in order to get the best from Mount, we need to push him on as the highest midfielder, where he can use his intelligent runs to get on the end of things.