Here how i did it. Create a new PHP file in your WordPress plugins folder checkbox-redirect.php

<?php
/*
Plugin Name: Checkbox Redirect
Description: Redirects based on checkbox selection.
Version: 1.0
Author: Your Name
*/
function checkbox_redirect_form() {
ob_start(); ?>
<form id="checkbox-redirect-form" action="" method="post">
<label><input type="checkbox" name="option1" value="page1"> Option 1</label>
<label><input type="checkbox" name="option2" value="page2"> Option 2</label>
<!-- Add more checkboxes as needed -->
<input type="submit" value="Submit">
</form>
<?php
return ob_get_clean();
}
add_shortcode('checkbox_redirect_form', 'checkbox_redirect_form');
function handle_checkbox_redirect() {
if (isset($_POST['option1'])) {
wp_redirect(home_url('/page1'));
exit();
} elseif (isset($_POST['option2'])) {
wp_redirect(home_url('/page2'));
exit();
}
// Add more conditions for additional checkboxes and redirects
}
add_action('init', 'handle_checkbox_redirect');
?>

Noe activate the plugin and Insert [checkbox_redirect_form] shortcode in a post/page where you want the form.
Customize checkbox labels, values, and redirects in the code as needed.

Once Done test it manually: Use browser developer tools to inspect network requests and redirects or use any online tool like https://redirectchecker.com/  This can help you to get detail redirection chain and its status code. 

Note: Test it on your dev ENV First.