is attack on titan (shingeki no kyojin) episode 87 filler?

As the group trying to stop Eren Jaeger travels to Odiha, Mikasa Ackermann ponders whether Eren has truly changed. She comes to realize that he may have always been this way, and wonders what she saw in him.

Mikasa remembers how the Scout Regiment arrives in Marley for the first time, disguised as ordinary citizens, and how they marvel at seeing a city outside the Walls. Onyankopon greets them and offers to take them to Kiyomi Azumabito's place, but before they can get anywhere, Hange Zoë, Conny Springer, and Sasha Braus are distracted by a car, which they have never seen before.