"The Eliminator", the show Robin, Dee, and Aunt Vi are fans of and start watching at the end seems to be a thinly disguised version of The Equalizer (2021) itself, with an almost identical beginning voiceover: "I'm the one you call when . . . ", as well as a similar title card and stinger music.
The title refers to the belief that 1 % of motorcycle gang members are involved in criminal activity.