They present a table of RT scores but it isn't quite clear what their criteria is or what the cut-off is - Longlegs, The Substance, Strange Darling, Abigail and A Violent Nature could all be contenders (it is a good year for horror). Godzilla Minus One is technically horror too.
A quick advanced search on IMDb throws up a different list. Nope sneaks in at #25 and The Menu, AQP2 and Prey seem odd oversights.