yeah it never stated that it was reality or not i got confused a little when reading it but i think the fact that it just was long and it seemed like it was reality ? if it wasn't then that was on me lel
I don't think it is stated explicitly, no. To me, the fact that at the end of the previous scene it said
As your imaginary landlady yadda yadda yadda...THE BELL RINGS!
"Coming!" she yells, and you couldn't agree more on those words.
Was enough of an indication that the fantasy got stopped by the actual ringing of the bell.