I also assume so because in the first leg Tottenham played with a higher level of ball possession and AZ Alkmaar only won because of one own goal so that it was just luck for the home team in the first leg. As for the second leg I think Tottenham will try with maximum ability in order to win with a higher score and be able to qualify for the next round to compete again in the last eight of the Europa League this season. And I am quite sure that Tottenham will not underestimate their opponents at home because being behind by one goal in the first leg is still quite possible for Tottenham to reply in the second leg.
But in terms of shots where AZ Alkmaar made many shots in the first leg this shows that they build attacks better without holding the ball a lot in their style of play. For me Tottenham is still very much favored because they will play in front of their supporters in the second leg later.
However, AZ Alkmaar already has capital from winning the first leg so what they have to do is play well and also improve their defense because the second leg Tottenham will play more aggressively to be able to score many goals. This season's Europa League Tottenham is very favored but if they lose to AZ Alkmaar of course it is a surprise that was not predicted before.