Window replacement according to RAL installation

Don't you always have these cover strips because PU foam is sprayed between the window and the wall? Isn't that completely normal? Since PU foam is sprayed between the window and the wall, there has to be a small gap somehow, otherwise it wouldn't be possible?!? Or am I mistaken here?

Isn't it always the case that you have these cover strips because the space between the window and the wall is foamed with PU foam?

In renovations without renewing the interior plaster, yes.