I don’t believe so. That says franchise players or transition players (not sure what that is). I don’t believe regular fa’s have a deadline.
“Clubs participating in the playoffs are permitted to sign free agents throughout the postseason, but are limited to a total of four free agent signings, including players on other clubs' Practice Squads, during the period that begins at 4 p.m., New York time, on the Wednesday after the final regular season weekend."
There was a rule proposal this off-season to not allow playoff teams sign players cut from non-playoff teams. That didn’t pass. I don't know that any team has tried this before.
I think the Steelers signed someone in December in 2020.
I doubt OBJ last through November before signing somewhere.