No, that is still old insulation, which will only be completely removed when the door is there. There will be no strips; it has to be plastered and painted in the same color.
That is a breakthrough to the outside, isn't it? Exterior doors and windows are usually plastered with plaster beads. On the floor, you have to seal with liquid plastic, for example. If I were you, I would inform myself a bit and not just slap plaster on.