No way. Brainrot GF and Awkward GF are two different people. This is Awkward GF.
https://mangadex.org/title/8c27bba8-eba6-440c-84e2-616651079e0e/my-awkward-girlfriend
https://mangadex.org/title/d0ddd740-4b91-4c66-bfd0-b36a77f8e730/brainrot-girlfriend
EDIT: I WAS WRONG. This isn't Awkward GF...