He's back next week apparently for Tonga against Samoa he hasn't made it substantially worse they're just resting him because the Lebanon game is meaningless how much they win by as long as they win
I think they never intended to play him in a game they are going to win 100% of the time without him and that makes sense given the Samoa game next week and finals are more important
It's the same ankle injury he's been carrying and waiting to deal with until after the tournament but there's no point him playing through it against Lebanon when they're going to win by 30-60 points regardless of whether he plays or not and for and against doesn't matter for Tonga anymore as they have the tie breaker over England so even if they lose to Samoa they should go through, and if they beat Samoa then it comes down to England/Samoa for and against for who the 4th team that goes through is (assuming Samoa beat PNG which they will)
They're incentivised to beat Samoa, since it means they would avoid Australia until the grand final and with Ponga out they surely prefer to play NZ in the semis
But again it doesn't matter how much they beat Lebanon by this week as long as they win whereas England have to stack points against France in case Samoa lose to Tonga so that they have a chance to bury PNG by enough and potentially make the finals as much as that's a long shot and England don't control their own fate anymore unless Tonga beat Samoa
I was surprised when they named Izzy in the first place this week, he'll be back against Samoa, meanwhile we'll have to enjoy Herbie stacking up tries against France this week and Hammer against PNG, Bostock for Australia and the NZ guys etc