Show only content in page after action click in WordPress admin

to create a page with your own content, you can do like that :

add_action("admin_menu", function () {

    $post_type = get_post_type_object("property");

    add_submenu_page(
          " "
        , "Page title"
        , ""
        , $post_type->cap->edit_posts
        , "property__validationForm"
        , function () {
            do_action("property/validationForm");
        }
    );

});


add_action("property/validationForm", function () {

    ?>

        <pre><?php var_dump($_GET);?></pre>

        form

    <?php

});

to create a URL to this page, use this code :

$url = admin_url("admin.php");

$url = add_query_arg([
    "page" => "property__validationForm",
    "property_ID" => $property->ID,
], $url);

for more informations about the function add_submenu_page, you can look in the codex :
https://developer.wordpress.org/reference/functions/add_submenu_page/