What treaty? The Palestinians backed out of the Oslo Accords that would have ended these settlements and Gaza was a unilateral action by Israel. Since then Hamas took over the strip and wholesale murdered the PA there. Agreements have been between Israel and the PA and Israel and Hamas.
Palestine never agreed to the Oslo Accords. And this fight is taking place in Gaza, instigated by the government of Gaza which has had zero settlements since Israel forcibly removed all the settlers in 2004/2005.
I didn't bring up the fucking Oslo accords! You did! At least keep track of your bullshit argument. Also there are settlements there right now, Israel doesnt deny it so stop simping.