Bayern Munich has a difference of 5 points with Union Berlin. If it is calculated from the squad that is owned by Bayern Munich, of course it is not a difficult thing. This means they are still able to catch up. The problem is this mathematical calculation sometimes does not apply in the field. I gave the example of Leichester City in the 2015/2016 English Premier League season. They succeeded in proving that mathematical formulas did not apply on the football field and they managed to lift the trophy at the end of the competition despite the depth of the squad owned by C. Ranieri and many other examples.
Back to Bayern Munich. I myself am still very confident that they can return to the 1st position in the Bundesliga even though luck may belong to Union Berlin this season.
to be honest, I see the Bundesliga becomes more interesting when there is an unexpected team (favorite) that manages to be above the bayern rankings. At first, people thought that Bayern's dominance in this season would continue but over time, in the last 5 matches, they only got 1 win, 3 draw and 1 loss. The issue that is currently hot is the news that Nagelsmann will be fired by Oliver Khan but I'm sure that's just a rumor.