PSG's job won't be easy in a tough group like Group F indeed. Newcastle, Dortmund and Milan are all challenging opponents for the current PSG. Because there isn't an impressive team play by PSG these days. They are expecting Mbappe to do most of the work. This can't help them be successful much in the Champions League.
This isn't the Ligue 1 in the end. PSG can find a way to maintain their title streak there but their job is very difficult in the Champions League. Mostly the team with the best team play win this title. We all saw what Manchester City did last season in the semi finals and finale even without Haaland's scoring or making an assist.
Honestly PSG should finish that group as the first place as well. Maybe it looks like it is not going to be that easy but it is going to be possible and they can beat all the teams there, they should be winning against all the teams there without a doubt. I think Dortmund is not that good this season and PSG could take them out, Newcastle is equally worse this season and could be an issue, only one could be Milan.
The real trouble would start with who will be the second, because all three could be second as well if they do better than expected, the difference is not as huge as people think. This should result with some good entertainment to follow this group and could make it fun to see the games, much better than City's group at least.