Postman Script: Only the Last Request is Getting Executed in a Loop, Why?

why this is happening only request at the last is only getting executed.
pre- request script:

const testCases = ['1002', '3002', '100002', 'singh', '1002y'];

    // Set the productid variable for the current iteration
    pm.variables.set('productid', testCases[3]);
    pm.sendRequest({
        url: pm.variables.replaceIn("{{baseUrl}}/products/:priductId"),
        method: 'GET'
    });

    pm.variables.set('productid', testCases[0]);
    pm.sendRequest({
        url: pm.variables.replaceIn("{{baseUrl}}/products/:priductId"),
        method: 'GET'
    });

test:

pm.test("Status code is 200", function () {
    pm.response.to.have.status(200);
    if(pm.response.code === 200)
    console.log("ok");
});

pm.test("Status code is 400", function () {
    pm.expect(pm.response.code).to.equal(400);
        if(pm.response.code === 400)
    console.log("Bad Response");
});

console:
 
GET https://valentinos-coffee.herokuapp.com/products/:priductId
400
271 ms
 
GET https://valentinos-coffee.herokuapp.com/products/:priductId
400
275 ms
 
GET https://valentinos-coffee.herokuapp.com/products/1002
200
269 ms
 
ok

In this code also same thing is happening

const testCases = ['1002', '3002', '100002', 'singh', '1002y'];

// Loop through test cases
for (let i = 0; i < testCases.length; i++) {
    // Set the productid variable for the current iteration
    pm.variables.set('productid', testCases[i]);

    // Make the API request
    const response = pm.sendRequest({
        url: pm.variables.replaceIn("{{baseUrl}}/products/:productId"),
        method: 'GET'
    });
}

as you can see from the console only at last the productid is being assigned,
tried promise also then only one request is going out,
tried adding artificial wait also to make it wait 3 seconds then also same thing is happening only the request at last is having the productid assigned.

i want to rectify it so that for each request there is an output from test then next request goes just like that