Manchester City managed to win two titles last season and I expect their performance to continue in this season as their coach is one of the best experienced people. I think Manchester City will do great this season under his leadership.
Manchester City didn't win two trophies last season, they won a treble (EPL, CL and Fa Cup), and despite that outstanding feat, they are still favorites to retain all the trophies they won last season, though it definitely won't be easy. Having said that, Pep is so important for City, he is a serial winner who doesn't give any room for complacency, even as City won a treble last season, he would continue to push his players to win it again this season, that is why he is the best manager in the world.
Sometimes they only see two major competitions such as local leagues in each country such as the Premier League, Serie A, La Liga and other local leagues in different countries, and the second competition they see is the Champions League. So it's not surprising, there are still people who only say Manchester City won the Premier League trophy and the Champions League even in fact, Manchester City get the treble which of course last season Manchester City won three trophies and not two. But regarding Pep Guardiola and Manchester City, basically this team still has a big chance to defend the title. But even so, I personally think that being able to defend the title is not easy because after all, other teams are also making efforts to be better next season.