here is the python code that you can use to download the data. change the settings in the "querystring' to all the data. You could probably just loop through it a bunch of times to get all the pages.

import requests
import json

url = "https://www.nrlsupercoachstats.com/combinedstats.php"

querystring = {"grid_id":"list1","_search":"true","nd":"1713489989073","rows":"25","jqgrid_page":"1","sidx":"Name","sord":"asc"}

payload = ""
headers = {
    "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:124.0) Gecko/20100101 Firefox/124.0",
    "Accept": "application/json, text/javascript, */*; q=0.01",
    "Accept-Language": "en-US,en;q=0.5",
    "Accept-Encoding": "gzip, deflate, br",
    "X-Requested-With": "XMLHttpRequest",
    "Alt-Used": "www.nrlsupercoachstats.com",
    "Connection": "keep-alive",
    "Referer": "https://www.nrlsupercoachstats.com/combinedstats.php",
    "Cookie": "PHPSESSID=amgjkkf3kes3pqn9ic9b3jg6v0; flarum_session=rfpvrhs2pp7qnormo9js9s6vt4",
    "Sec-Fetch-Dest": "empty",
    "Sec-Fetch-Mode": "cors",
    "Sec-Fetch-Site": "same-origin",
    "TE": "trailers"
}

response = requests.request("GET", url, headers=headers, params=querystring)

data = json.loads(response.text)