Customise WordPress Plugin

I need to customise the WP Notification Bell Plugin

https://wordpress.org/plugins/wp-notification-bell/


i have two custom post types:
hp_requests and hp_listings

if a user has a new comment on their listing post type : i need to show some this text in the notification

if a user has a new comment on their request post type: i need to show some different text

you dont have to add any extra settings in the plugin admin just show me (which file) when i can change the text, i dont want anything else from the plugin changed, the notifications should still like to the correct post.

thanks!.