a month ago I created a new website with Magento 2 and I used the data migration tools to migrate the old website from Magento 1. Since then the old website has added new products to the store and now I need to insert these new products into my new Magento 2 store, plus I need to update the already existing products. Is there a way to do this? Data migration tools doesn't let me do that, I've tried exporting/importing from Magento and Magento 2 core but it doesn't work.

Any advice please?

A month ago I created a new website with Magento 2 and I used the data migration tools to migrate the old website from Magento 1.

Since then the old Magento1 website has added new products to the store and now I need to insert these new products into my new Magento 2 store, plus I need to update the already existing products. 

Data migration tools don't let me do that, I've tried exporting/importing from Magento 1 and Magento 2 core but it doesn't work.

Is there a way to do migrate product from Magento1 to Magento2?

Any advice, please let me know?