The NZ and Australian squads are frighteningly good when compared to all the others, including England.
The Australian backs are incredible. At fullback they are spoilt for choice, including the freak of nature who is Latrell Mitchell, James Tedesco (fullback in the Dally M team of the year 2022), and Valentine Holmes (top points-scorer 2022). So that's without Tom Trbojecvic (player of the year in 2021), Nicho Hynes (player of the year 2022), and Dylan Edwards - who's an outstanding full back and MOTM in the Grand Final (and voted 4th in the best player of the year 2022). Any of those would walk into any Superleague side.
That's before you even mention Nathan Cleary.