password_hash() cannot recognize my password correctly [duplicate]

I know I registered ” 1 ” as the password but as I check the password stored in the DB using password_verify(), it can’t be recognized correctly. Can someone point out what I did wrong? If I use md5() or sha1() it works fine but I know, this is a more secure implementation of hashing password.

handleForms.php

if (isset($_POST['registerUserBtn'])) {

    $username = sanitizeInput($_POST['username']);
    $first_name = sanitizeInput($_POST['first_name']);
    $last_name = sanitizeInput($_POST['last_name']);
    $password = $_POST['password'];
    $confirm_password = $_POST['confirm_password'];

    if (!empty($username) && !empty($first_name) && !empty($last_name) && !empty($password) && !empty($confirm_password)) {

        if ($password == $confirm_password) {

            $insertQuery = insertNewUser($pdo, $username, $first_name, 
                $last_name, password_hash($_POST['password'], PASSWORD_DEFAULT));

            if ($insertQuery) {
                header("Location: ../login.php");
            }
            else {
                header("Location: ../register.php");
            }

        }

        else {
            $_SESSION['message'] = "Please make sure that both passwords are equal";
            header("Location: ../register.php");
        }
    }

    else {
        $_SESSION['message'] = "Please make sure that all input fields are not empty!";
        header("Location: ../register.php");
    }
}

if (isset($_POST['loginUserBtn'])) {

    $username = sanitizeInput($_POST['username']);
    $password = $_POST['password'];

    if (!empty($username) && !empty($password)) {

        $loginQuery = loginUser($pdo, $username, $password);
        $userIDFromDB = $loginQuery['user_id']; 
        $usernameFromDB = $loginQuery['username']; 
        $passwordFromDB = $loginQuery['password'];

        echo "WHAT YOU TYPED: " . $password . "<br>";
        echo "FROM THE DB: " . $passwordFromDB . "<br>";

        if (password_verify($password, $passwordFromDB)) {
            echo "YES EQUAL";
        }

        else {
            echo "NOT EQUAL";
        }
    
    }

    else {
        $_SESSION['message'] = "Please make sure the input fields 
        are not empty for the login!";
        header("Location: ../login.php");
    }
 
}

models.php

function insertNewUser($pdo, $username, $first_name, $last_name, $password) {

    $checkUserSql = "SELECT * FROM user_accounts WHERE username = ?";
    $checkUserSqlStmt = $pdo->prepare($checkUserSql);
    $checkUserSqlStmt->execute([$username]);

    if ($checkUserSqlStmt->rowCount() == 0) {

        $sql = "INSERT INTO user_accounts (username, first_name, last_name, password) VALUES(?,?,?,?)";
        $stmt = $pdo->prepare($sql);
        $executeQuery = $stmt->execute([$username, $first_name, $last_name, $password]);

        if ($executeQuery) {
            $_SESSION['message'] = "User successfully inserted";
            return true;
        }

        else {
            $_SESSION['message'] = "An error occured from the query";
        }

    }
    else {
        $_SESSION['message'] = "User already exists";
    }

    
}

function loginUser($pdo, $username, $password) {

    $sql = "SELECT * FROM user_accounts WHERE username=?";
    $stmt = $pdo->prepare($sql);
    $stmt->execute([$username]); 

    if ($stmt->rowCount() == 1) {
        $userInfoRow = $stmt->fetch();
        return $userInfoRow;
    }

}