ng.go

package main

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

const requestURL = "https://twitter.com/utgwkk"

func main() {
	resp, err := http.Get(requestURL)
	if err != nil {
		log.Fatal(err)
	}
	fmt.Println(resp.Status)
}

ok.go

package main

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

const requestURL = "https://twitter.com/utgwkk"

func main() {
	http.DefaultTransport.(*http.Transport).ForceAttemptHTTP2 = false
	resp, err := http.Get(requestURL)
	if err != nil {
		log.Fatal(err)
	}
	fmt.Println(resp.Status)
}

% go1.16.15 run ok.go
200 OK

% go1.16.15 run ng.go
404 Not Found

% go1.18.2 run ok.go
404 Not Found

% go1.18.2 run ng.go
200 OK