Odighizuwa was the last member of the 2021 Cowboys draft class left on the team's roster. Given that he just got a four-year, $80M extension from the team a year ago, it stood to reason that he would be around for a while. The NFL is fairly unpredictable though, obviously.
New defensive coordinator Christian Parker comes from a scheme that makes heavy use of the penny front, which uses five-man fronts to overwhelm and confuse offensive lines. With the trio of defensive tackles - Odighizuwa, Williams, and Kenny Clark - the Cowboys had the perfect interior for that package.