Substitute golden syrup for the Canadian maple syrup if you like. If you do that then it’s not necessary to add the flour. Because the consistency of maple syrup is more runny, the flour helps it to thicken. When we made Pecan Pies in my restaurant years ago we never had maple syrup only golden syrup that is basically corn syrup flavoured. This has the necessary consistency that thickens the filling. I’ve also boosted the nut filling here and reduced the qty of syrup because of how expensive real maple syrup is. Just remember that golden syrup is very much sweeter than maple syrup, so add more nuts and less syrup. I tried it on a 1:1 ratio and I was very sweet for me.