The Jets’ first home AFC East game of the season arrives with a simple question hanging over the week: is what they’ve built on the ground and in practice real enough to matter against a divisional opponent?

That test comes Sunday against the Dolphins, who will be the first AFC East team to play at MetLife Stadium this season. The Jets are 2-4 after last Sunday’s 26-19 loss to the Patriots, so the margin for error is already thin. Now they get a Miami team coming off a bye and still searching for its first win at 0-5.

The timing is notable because the Jets are also getting healthier. Wide receiver Adonai Mitchell returned to practice on a limited basis Wednesday after missing the past four games because of a finger injury and subsequent hand procedure. If Mitchell is able to play Sunday, the Jets would have their full complement of pass catchers for the first time since their season-opening win over the Titans.

That matters for an offense that has been leaning harder into its run game.

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Braelon Allen has become the clearest example of that shift. He ran for a career-high 116 yards on 24 carries in the Jets’ 17-12 win over Cleveland, then followed it with 194 rushing yards over the last two games, a total that ranks third in the NFL. Over that two-game stretch, Allen joined Curtis Martin and Chris Ivory as the only Jets running backs since 1991 to record at least nine runs of 10-plus yards.

The broader numbers back up the recent surge. After managing only 59 rushing yards in Week 4, the Jets piled up 231 rushing yards in Weeks 5 and 6 and averaged 3.9 yards per carry. They had only six explosive runs of 10 or more yards through their first four games, then added more burst as the ground game picked up.

The scheme has been part of the story, too. The Jets’ stock report credited offensive coordinator Frank Reich’s approach with creating explosives in the run game, while also noting that the offensive line has executed its assignments at a high level. Even with that progress, the Jets have used the 21 personnel package only twice this season, and they have scored seven of their 11 touchdowns in multiple tight end personnel packages.

That leaves Sunday’s matchup with a built-in tension: the Jets have found a run-game rhythm, but they have not yet had many chances to show it against a division opponent at home.

There are other layers to the matchup as well. Jets head coach Aaron Glenn and Dolphins coach Jeff Hafley worked together in Cleveland during the 2014-15 seasons. The Jets also have two former Dolphins on the roster in safety Minkah Fitzpatrick and kicker Jason Sanders, who ranks third in Dolphins franchise history with 826 points.

Miami brings its own profile into the game. The Dolphins are the youngest team in the league, with an average age of 25.5 and 14 rookies on the active roster. They also average 3.7 yards per play in their 21 personnel scheme. On offense, Malik Washington leads Miami with 262 receiving yards but has not scored a touchdown, while De’Von Achane is out for the season with a torn ACL.

For the Jets, the question is less about whether the pieces are there than whether they can hold together in a more meaningful setting. Mitchell’s return to practice adds another layer of availability. Allen’s recent production gives the ground game a clear identity. Sunday will show whether those developments can travel from a promising stretch into a divisional game that asks for more.