It is certain that most people will not bet on Bayern Munich's victory in the match against Manchester City later. Even so, I prefer to bet over 2.5 goals, in my opinion it still makes a lot of sense because each team will definitely score each other's goals rather than having to bet on the winning team. Moreover, Manchester City will host the first leg and will struggle hard to win on aggregate.
Munich will also be quite difficult to score in the match later. since the group phase, Man City has only conceded against Dortmund and Sevilla when playing at home. and that's not more than 1 goal. Man City is very strong when playing at home. so the first leg is most likely Man City will get the win even with few goals. even without conceding. that could have been avoided by Munich if they played tight by locking up the fearsome front line of Man City. but obviously, it takes some hard work.
After all, do you believe more people will bet over 2.5 goals?
Everyone has their own preference, so we can't assume they won't bet on a Bayern Munich win. Because after all, this is a big match which of course the home and away teams have a chance to win and also, each of these teams has fanatical fans as well so of course there will still be those who bet on Bayern Munich's victory.
In addition, in the Champions League very often the results are only with low scores, and even though these are big matches they are also not a guarantee to be able to score many goals because this is the Champions League. So, with so many betting options available, of course they are free to choose whatever betting option they like.