Will event shop reset after part 2 comes out?

To the best of my knowledge yes.

not too sure about this. but if you look at the nodes right now, it does say that it has 16 days left to it.
and if you look at the Event 2 CEs; Knights of Marines and Meat wars, they increase both IRON and Ishka Alloy drops, STONE and Eadrom Alloy drops respectively. which would make no sense if they're planning to remove the first island after part 2 comes in.