How do I combine the two json files and use their contents together?

Question

How do I combine the two requested json files and work with their contents? How do I place their contents into a variable and work with them throughout the program? Assistance would be appreciated as I am stuck attempting to merge the two data files which are formatted like below. So if I wanted to combine the lapsLed key after names, raceWin, and number I would be able to without problems.

async function populate() {

    const requestURL = 'nascar.json';
    const request = new Request(requestURL);
    
    const response = await fetch(request);
    const nascarDrivers = await response.json();
    
    findDriver(nascarDrivers);

    return nascarDrivers;
}

async function texas() {

    const requestURL = 'texasMS.json';
    const request = new Request(requestURL);
    
    const response = await fetch(request);
    const texasLaps = await response.json();
    
    findLaps(texasLaps);

    return texasLaps;
}

{
    
    "season" : 2022,
    "sport" : "Nascar",
    "drivers" : [
      {
        "name" : "Chase Elliot",
        "raceWin" : "Low",
        "number" : 9
      },
      {
        "name" : "Kyle Larson",
        "raceWin" : "High",
        "number" : 5
      },
      {
        "name" : "William Byron",
        "raceWin" : "Medium",
        "number" : 24
      },
      {
        "name" : "Kevin Harvick",
        "raceWin" : "Medium",
        "number" : 4
      },
      {
        "name" : "Kyle Bush",
        "raceWin" : "Medium",
        "number" : 18
      },
      {
        "name" : "Kurt Bush",
        "raceWin" : "Medium",
        "number" : 45
      }
    ]

{
    
    "track" : "Texas",
    "sport" : "Nascar",
    "drivers" : [
      {
        "name" : "Chase Elliot",
        "lapsLed" : 180
      },
      {
        "name" : "Kyle Larson",
        "lapsLed" : 72
        
      },
      {
        "name" : "William Byron",
        "lapsLed" : 0
      },
      {
        "name" : "Kevin Harvick",
        "lapsLed" : 55
      },
      {
        "name" : "Kyle Bush",
        "lapsLed": 33
      },
      {
        "name" : "Kurt Bush",
        "lapsLed" : 10
      }
    ]
  }