Not sure where the stat is, but third down conversions overall seem close to the same. The last three games in 2022 increased Dallas third down opponent conversion percentage and part of that was just meaningless games in blowouts.
As far as ranking, Dallas was two last year, while they are currently tenth this year.
And the TO margin is clearly in favor of last year.
Right now, it’s the scoring defense in favor of 2022. But you got to remember Dallas is playing TOP with the run game. They’ve slowed the game down.
https://www.teamrankings.com/nfl/stat/opponent-third-down-conversion-pct