golang not printing all the HTML

I'm trying to get the HTML of a website but it does not show me all the HTML. I have tried using python and it shows everything fine. However it does not in golang.

Here is my code :

package main

import (
	"fmt"
	"io/ioutil"
	"log"
	"net/http"
)

func main() {

	res, err := http.Get("https://golf-land.fr/37-chaussures-de-golf-homme/s-6/marque_2-jordan_golf")
	res.Header.Set("User-Agent", "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/93.0.4577.63 Safari/537.36")
	res.Header.Add("Accept", `text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9`)
	res.Header.Add("sec-ch-ua", `"Google Chrome";v="93", " Not;A Brand";v="99", "Chromium";v="93"`)
	res.Header.Add("sec-ch-ua-platform", "macOS")
	res.Header.Add("Accept-Encoding", "gzip, deflate, br")
	res.Header.Add("Sec-Fetch-Mode", "navigate")
	res.Header.Add("Accept-Language", "fr-FR,fr;q=0.9,en-US;q=0.8,en;q=0.7")
	res.Header.Add("Sec-Fetch-Dest", "document")
	res.Header.Add("Connection", "keep-alive")
	res.Header.Add("Host", "golf-land.fr")
	res.Header.Add("Upgrade-Insecure-Requests", "1")
	res.Header.Add("Cookie", "_gcl_au=1.1.1697272256.1647946908; _ga=GA1.2.1737361814.1647946908; _fbp=fb.1.1647946908571.1339014446; browserupdateorg=pause; PHPSESSID=pl50pcpu4h09pqqgnf9m22o4p6; PrestaShop-90e2722599b5b00d1f7517fdd071a2e0=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; _gid=GA1.2.562051467.1648368266")

	if err != nil {
		log.Fatalln(err)
	}
	body, err := ioutil.ReadAll(res.Body)
	if err != nil {
		log.Fatalln(err)
	}
	sb := string(body)
	fmt.Print(sb)
}

it is missing the products-row division in the output, which appears in the browser or with python

The http.Get constructs and sends the request and then returns the server's response to that request. Setting headers after the request was sent (to its response no less) has NO effect on the already sent request itself. You should use http.NewRequest to construct the request, then set the request's headers, and then send it with the (*http.Client).Do method.

func main() {
	req, err := http.NewRequest("GET", "https://golf-land.fr/37-chaussures-de-golf-homme/s-6/marque_2-jordan_golf", nil)
	if err != nil {
		panic(err)
	}

	req.Header.Set("User-Agent", "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/93.0.4577.63 Safari/537.36")
	// set the rest of the headers ...
	
	res, err := http.DefaultClient.Do(req)
	if err != nil {
		panic(err)
	}

	body, err := ioutil.ReadAll(res.Body)
	if err != nil {
		panic(err)
	}
	fmt.Println(string(body))
}