The Final Fantasy XIV Endwalker Official Benchmark uses actual maps and playable characters to assign a score to your PC and rate its performance including scene loading times.
The benchmark gives an overall load time as well as loading times by scene.
Lexar's NM790 with Heatsink does very well in the Final Fantasy XIV Endwalker Official Benchmark. As well as topping the total time chart it also tops two of the five Scene loading times and sits in second place in the other three.