Eh, it’s just a nosy old lady who probably remembers when Owen and Beru lived there.
EDIT: It’s also worth noting that having her ask “Rey who?” is meant to mirror the Aki Aki girl from earlier in the film (the one that asks for her family name).
I’ve spent so much time now in the version of this film where I’ve cut out most of Terrio’s “characters saying things that other characters have already said” style of trying to imbue writing with meaning and import that I forget sometimes just how awful the script is lmao.