Duplicate slices in pages

It would be a cool feature to be able to duplicate slices within a custom type

Hello,

Thanks for reaching out to us.

If I understood your question correctly, it states that you want to reuse one slice within a different Custom Type. If so, you can add Slices to the Slice Library from the Custom Type editor. Find more details in Reuse Slices article.

If that's not the case, I'd like to understand your use case. Could you please elaborate more?

Thanks,
Priyanka