I bought the older edition and it's still in my library. It's also viewable if you click on Micah's profile page. It's still accessible and available, it just isn't on the creator page because they want to put more focus on the newer edition.
Viewing post in Bastards.: Pearlescent Edition comments
I'm a bit confused because I am in a conversation with you and customer support from itch which you haven't responded to. It brings up as has been brought up before many times, that you can make a legacy version available to those who bought it before via the restricted access setting. So please just do that.