is bleach: thousand-year blood war (bleach: sennen kessen-hen) episode 2 filler?

In Silbern, with Luders Friegen gasping in pain in a pool of blood on the floor in front of him after having had his right arm severed, Yhwach observes that he does not need to strain himself by attempting to sit up since he must be in incredible pain and permits him to give his report while lying down, which Luders thanks him for. However, when Yhwach notes that Luders does not need his legs either if he is not going to sit up, a mortified Luders forces himself up and claims that he would never disrespect Yhwach by talking to him by lying down.