How to make a dropdown list in Google spreadsheet that links to another document?

Question

Google Sheets

I want to make a dropdown list, the values ​​​​of which will be in another document. Now I use the variant with the importrange () function. That is, I pull the data from the second dox into the first one on a separate sheet, and already make a drop-down list from it.

Is there an option to get rid of this intermediate sheet and take data immediately from the second dox?

Answer 1

Wishlist is old.
Hide the intermediate sheet if the eyes are callused.