Wee Baby Seamus
Yo, Goober, where's the meat?
Mount had one against Norwich in 2021, Abraham against Wolves in 2019.When was the last time a club had an own product scoring a hattrick?
Foden had one in the Manchester derby last season.
Also Harry Kane, obviously.
I don't think it's as unique as it might instinctively seem.
EDIT: just looked and the most recent was literally six weeks ago - Evan Ferguson against Newcastle.
EDIT2: TIL that Evan Ferguson had 3 senior apps for Bohemians before going to Brighton