Barry Trotz’s concern level for Mat Barzal’s availability for Thursday’s Game 6 of the Eastern Conference semifinals is “pretty moderate.”

It sounds as if the Islanders’ first-line center already is improving after taking a stick to the face in the third period of Tuesday’s 4-3 overtime loss to the Flyers in Game 5.

“I think everything is trending in the right area. Hopefully, by (Thursday) I can give you a more specific answer on that,” Trotz said Wednesday on a Zoom call. “But everything is trending in the right direction right now.”

Barzal left the game with a bloodied towel over his face after being struck by Claude Giroux’s stick on a follow-through of a shot with a shade under five minutes remaining in regulation.

Without their regular-season leading scorer, the Isles rallied from a 3-1 hole to tie the score on goals by Brock Nelson and Derick Brassard, but Barzal did not return to the ice for the overtime period.

J-G Pageau moved up from the third line to take Barzal’s spot on the top unit between Anders Lee and Jordan Eberle. The Isles had multiple legitimate scoring chances to start the extra session, but the Flyers stayed alive on Scott Laughton’s deflection goal to force Game 6. Forwards Ross Johnston, Tom Kuhnhackl and Michael Dal Colle were the healthy scratches in Game 5.

Flyers coach Alain Vigneault actually revealed more info about Barzal than Trotz did, telling reporters Wednesday that he rode an elevator with the opposing center after the game and that he was glad to learn the injury was “nothing serious.”

“That could have been a real bad accident, but fortunately the young man is all right,” Vigneault said.

Center Casey Cizikas believes the Isles are “used to” the playoff bubble after several weeks in Toronto, even if the fans on Long Island don’t get to attend any games.

“I think we all realize how big this opportunity is that we have,” he said. “We want to play well for everybody watching back on the Island and we want to prove to ourselves that we can do this. We have the team that can. We’re going out there to do one thing and one thing only and that’s to win. We’re trying to give ourselves a chance at the grand prize. At the start it was a little weird, but now we’re used to it.”