I don't think KS has much choice at this time other than to support Gething with the GE looming large, there’s no way he’s going to risk civil war in the Labour Party this close to the GE which is what would happen if there was a vote.
I think KS will wait until after the GE and go from there. As much as I’d like to see Gething get his marching orders, I think the vote of confidence vote is academic ow because none of the Labour AM’s will risk breaking ranks 4 weeks before a GE, however if it was after the GE and there was a Labour government in Westminster it would be a different proposition.