The unit scored 15 points in Game 1 and 12 in Game 2.

It has made 10 of 27 field-goal attempts.

The Knicks’ bench, one of the team’s primary assets throughout the regular season, suddenly has become a weakness with the Eastern Conference semifinals tied 1-1 going into Saturday’s Game 3 with the Heat.

Some of that can be attributed to injuries, reserves being pressed into starting roles.

The opposition is obviously better on a nightly basis. But this also can be attributed in part to the Knicks’ new rotations.

Tom Thibodeau robbed Peter to pay Paul by moving Josh Hart into his first five in place of Quentin Grimes.

Grimes had been a starter since late November. Hart mostly was part of the second unit with Obi Toppin, Immanuel Quickley and Isaiah Hartenstein.

When Grimes suffered a right shoulder injury in Game 3 of the first round against the Cavaliers, Hart replaced him. And Grimes hasn’t reclaimed his starting spot.

The quartet of Hart, Quickley, Toppin and Hartenstein was fantastic during the regular season, outscoring the opposition by 16.1 points per 100 possessions. In the playoffs, that number is still solid — plus-6.3.

But Thibodeau has gone away from it.

The Knicks’ bench struggles are not just tied to Grimes replacing Hart with the bench group.

Quickley, a Sixth Man of the Year finalist, hasn’t been the same player in the playoffs, averaging just 8.6 points on 35.2 percent shooting after being such an integral part of the Knicks’ success during the regular season.

Toppin has had ups and downs in the playoffs as well, alternating quality performances with shaky ones. If both don’t perform well, the bench is going to struggle, no matter who the fifth starter is and who is with the reserves.

Thibodeau clearly wants to match up Hart with Heat star Jimmy Butler.

But the lack of continuity may be hurting one of the Knicks’ strengths.

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The Knicks didn’t need Julius Randle to beat the Cavaliers. They could survive without him at his best.

Two games into the next round, however, it is clear that won’t be the case against the Heat.

They need their lone All-Star to play like one to advance, primarily because of how well he has performed against Miami and the Heat’s lack of options to defend him.

This isn’t just about Randle’s strong all-around performance in a come-from-behind Game 2 victory. Randle went for 25 points, 12 rebounds and eight assists on a sprained left ankle that isn’t fully healed.

It’s also about what he did against the Heat in four regular-season meetings, averaging 21 points, 7.5 rebounds, 4.8 assists and shooting 41.4 percent from 3-point range.

Bam Adebayo has struggled defending Randle this season, and when the Heat’s top defender has to guard him, it opens up the paint for the other Knicks.

The Knicks don’t win Game 2 without Randle, and they won’t win this series without him at his best, either. He changes how the Heat defend them.

The Heat have received plenty of accolades for the cadre of undrafted players in their rotation, from Caleb Martin and Duncan Robinson to Max Strus and Gabe Vincent.

It’s an incredible testament to their scouting department and talent development staff.

Of the teams left in the playoffs, though, the Knicks are right behind them. This isn’t a team stocked with former lottery picks, as the Celtics, 76ers, Lakers and Warriors are.

The Knicks start two second-round picks: Jalen Brunson and Mitchell Robinson. Their rotation includes three late-first-round choices, Quickley, Hart and Grimes, and another second-rounder in Hartenstein. Two more second-round choices, Jericho Sims and Miles McBride, played valuable roles as reserves during the regular season.

Only Randle, Toppin and RJ Barrett were top-10 picks.

Some of this is player development. Some is shrewd work by the front office. Like the Heat, the Knicks deserve credit for finding hidden gems.

There was a euphoric atmosphere in the Garden for the Cavaliers series.

Part of that stemmed from the way the Knicks performed, overwhelming the opponent. It was also the first time in a decade the building was full for the postseason.

The two home games against the Heat were different. Yes, they were sold out. Yes, the building was full of celebrities, such as Carmelo Anthony, Steve Cohen, Chris Rock and Jessica Alba for Tuesday night’s Game 2.

There was an uneasiness to the first two games of the Eastern Conference semifinals, though.

The Heat get some credit for that. They mostly outplayed the Knicks, who were fortunate to come away with a split. The big, bad MSG crowd couldn’t intimidate the Heat as it did the Cavaliers.

But the experience also was no longer new. The buzz wasn’t quite the same, the energy not quite as electric.

I expect that to change for next Wednesday’s Game 5 if the Knicks can get one game in Miami and the orange-and-blue faithful believe a spot in the conference finals is realistic.