asign custom feed theme to custom post type

Hey everyone,

I am facing the following issue: I want to create a customized RSS feed for each of the custom post types that I use in my theme. I managed to register the new feed template and the callback function, to create the template file and to modify the template file as I wish (essentially I did as described here: https://www.wpbeginner.com/wp-tutorials/how-to-create-custom-rss-feeds-in-wordpress/ ).

Now here is my question: How can I assign a particular post type to this template? In other words, I want Custom post type A to be displayed using feed template A, and Custom post type B to be displayed using feed template B. If I use my newly created template, it only displays entries with the post type “post”.

If any additional infos are required, please let me know, Thanks already in advance!