There's a list of available post-related params for conditions in documentation:
Param Description
post_ID Post ID
page_template Page template
parent_id Parent post ID
post_format Post format
Could you consider adding post_type parameter there?
Or there's a different approach to manage a field visibility based on post type?
I have the same meta box registered for 2 different post types but I'd like to hide some fields in one of them.
Thank you.