In Magento 1, after every product uploaded, you need a re-index required.
In Magento 2 to run the Reindex, you should setup the cron job.
If you want reindex immediate then you should run
php bin/magento indexer:reindex command from Terminal
How to Setup Cron in Magento 2?
You have to have SSH access to your Magento 2 installation in order to run it as smooth as it should. Make sure, you get the access.
As soon as you have access to your instance, go to the Magento 2 root directory and run
php bin/magento cron:install. That should be enough.
In case the only way for you is to add the cron through an admin interface like cpanel; try to add the cron jobs line by line.
* * * * * <path to php binary> <magento install dir>/bin/magento cron:run | grep -v "Ran jobs by schedule" >> <magento install dir>/var/log/magento.cron.log * * * * * <path to php binary> <magento install dir>/update/cron.php >> <magento install dir>/var/log/update.cron.log * * * * * <path to php binary> <magento install dir>/bin/magento setup:cron:run >> <magento install dir>/var/log/setup.cron.log
Depending in the admin panel, you might have to enter the path to the PHP binary. If you are not sure which path it is, just try php.