FAQ: Quick View
Yes, the Quick View button, as well as the Magento preview window, can be customized in keeping with your needs. See the instructions below.
It is indeed possible to make changes to the popup contents by performing the code changes. Please, make backups of the files you modify to be able to restore the originals and proceed with the following guide: https://amasty.com/docs/doku.php?id=magento_2:quick_view#how_to_delete_a_block_from_a_quick_view_window
Magento AJAX quick view includes all usual actions like choosing an item configuration, adding it to wishlist/compare, read and write reviews, etc.