I also think so, overall Real Madrid's performance this season is very inconsistent and also the matches in UCL cannot be underestimated especially overall the strength of RB Salzburg and Brest is not that bad this season so it is also possible for RB Salzburg and Brest to make a surprise when playing against Real Madrid later.
I think everything is possible in the remaining 2 UCL matches before the playoffs later and I think Real Madrid cannot be favored excessively.
It will definitely not be difficult to beat Salzburg, because they play poorly against top teams and Real will easily beat them, but with Brest everything may not be so simple, because they played this group tournament not badly, but I think Real is quite capable of beating them. Therefore, the whole intrigue in this group stage of the new format remains only in whether Real will be able to enter the top 8 or not.