It actually outperformed by a little the wildcard game in the same slot last year that was on NBC broadcast channel.
From the article:
While streaming accounted for the lion’s share of the primetime Wild Card game’s viewership, the preliminary estimate also includes impressions served up via the
NBC affiliates in Miami (WTVJ-6) and Kansas City (KSHB-41). Per Nielsen, Saturday night’s game was up 6% versus the analogous Chargers-Jaguars broadcast on NBC last year (20.6 million linear-TV viewers, plus another 1.2 streamers).
Held in subzero conditions, the Chiefs’ 26-7 victory now stands as the fifth-coldest
NFL playoff game on record. As it happens, the Peacock deliveries were in keeping with a major media shift from nearly a decade ago; when
ESPN kicked off cable’s first postseason game on Jan. 3, 2015, that Cardinals-Panthers Wild Card averaged 21.7 million viewers.
The official figures for the Peacock Wild Card game, including a breakdown of the number of fans who watched one of NBC’s local TV feeds, will be available on Friday. That said, the home-market turnout should be substantial, as the game averaged a 45.1 household rating in Kansas City—where 74% of the TVs in use were tuned to KSHB—and a 14.5 in Miami (41%). All told, approximately 710,000 homes tuned in across the NBC affiliates.