Tagesschau is a German news Journal and TV news broadcast which tries to report neutrally and without giving any opinions.
The Tagesschau journalists don`t tell what side they are on, neither pro nor con Johnson. They report neutrally on what happens at any point of time, unless they publish a journalist`s comment on any topic. One example for a neutral headline is:”Antrag auf Neuwahlen: Johnsons nächstes Brexit Manöver” from the 24th October (Application for new elections: Johnson`s next Brexit maneuver)
If necessary they sometimes summarize events to overview what happened, e.g. according to Brexit.