After the resolution of DB super and the universes are restored, Zeno mentions another universe where destruction of half is possible. For grins and to see the fight, Zeno drops Universe 7's team (restored to health) into the final battle between the Avengers and associated forces vs. Thanos and his forces.
The team's mission is to get the gauntlet, bring it back - and eliminate all opposition if need be.
The time is when both armies face off, before they charge.
Don't want this to be a stomp, so the Universe 7 folks try to get the gauntlet first, they just don't open fire. They can when the fight starts if they face opposition after an attempted grab.