Magento 2.2.2 Web Setup Wizard not visible in backend

this is a known issue. since early 2.0 and still not fixed in 2.3.1

https://github.com/magento/magento2/projects/14#card-3854114

https://github.com/magento/magento2/blob/2.2-develop/app/code/Magento/Backend/Model/Setup/MenuBuilder.php#L47

  /**
     * Removes 'Web Setup Wizard' from the menu if doc root is pub and no setup url variable is specified.
     *
     * @param Builder $subject
     * @param Menu $menu
     * @return Menu
     * @SuppressWarnings(PHPMD.UnusedFormalParameter)
     * @since 100.1.0
     */
    public function afterGetResult(Builder $subject, Menu $menu)
    {
        if ($this->docRootLocator->isPub()) {
            $menu->remove('Magento_Backend::setup_wizard');
        }
        return $menu;
    }
}

============================================================================== FIX:

you can:

1. comment that function.
2. create nginx rewrite logic.
3. using manual redirect:

https://github.com/magento/magento2/issues/4159#issuecomment-244483087

dont forget that you must have 2 doc roots for your website and setup.

## Set Magento root folder
set $MAGE_ROOT /var/www/html;
## Set main public directory /pub
root $MAGE_ROOT/pub;

...

location ~ ^/(setup|update) {
    root $MAGE_ROOT;