Khadijah's House in the Jannah

In this post we look at a hadith. My translation:

Abu Bakr b. Abi Shaybah told us, and Abu Kurayb and Ibn Numayr said, Ibn Fudayl told us, from Umarah, from Abu Zur'ah, he said: I heard Abu Hurayrah. He said: Jibril came to the prophet [SAW] and said: Messenger of Allah, this is Khadijah. She has come to you, with her a vessel containing relish or food or drink so when she has come to you, read upon her the salam from her lord azza wa-jalla and from me and give her good news of a house in the Jannah of reeds in which there is no clamour or distress. Abu Bakr in his narration from Abu Hurayrah said: And he did not say: I heard. And he did not say in the hadith: From me.

https://sunnah.com/muslim:2432

Why might Jib have had to tell him that Khadijah was there? Was she invisible? Was what she brought invisible? 'So when she has come to you'? But hasn't Jib just told him that she had come? If she came later, would she be visible? If Allah's boss was to greet her with the salam from 'her lord' AND himself, are the two equal? Is she getting a new house, one made of reeds? What kind of house did she currently live in? Was that one noisy?